Best Way To Store And Sold Coins ?

The % depends on both the item and the coin shop's local market. Gold and Silver bullion are probably bought for 85-90% of retail. Quick sellers might be bought for 65-70% of retail. Slow sellers might be bought for 30-35% of retail.

Things like unsorted foreign coins might be bought for a few dollars a pound.

To answer the first part of your question regarding coin storage. Probably the best thing you could do is to store them in air tight capsules. They come in various sizes. Check ebay. Even slabbed coins are not air tight like the capsules are. Short of that, the bulk of my collection gets stored in a safe with desiccant pouches. Most of my coins are in cardboard 2x2's in binder pages. Those in albums or folders are stored in zip lock bags and desiccant packs.

to the Community!

If only a small collection I would recommend you sell them yourself through various sites like ebay, Facebook Marketplace, kijiji, Craiglist. Local dealers won't give your market value or even retail value of coins.. Maybe 10 or 15% off retail for a select few coins and 30% to 70% off retail for less popular coins.

I would only use LCS to sell coins if I had too many (hundreds to thousands) to sell and had to get rid of them in a hurry for reasons like illness or death.

ebay will charge Canadian buyer tax according from a province.
Then will add to this shipping cost.
Then on basis of the this sum will calculate 13% ( ebay fees) and will add the sales tax.
Then this amount will deduct from Sale Price + Shipping.
This is what you will get at the end.

Ship with Tracking only. You may make your listing bit more attractive by reducing shipping cost and pay few $ out of your pocket.

Saying above, realize that still thousands people make money on ebay sales, depends what are they selling.

Basically, it very depends on your targets.
I assume, you aren't planning to make money on your coins, but want to return highest percentage as possible from your funds.
You will not make money on random coins, but at the best will get 60%-70% from retail cost back, unless you own some demanded coin, like let's say 2015 Renewed Voyageur Silver Dollar.

Check sold listings for coins as yours and price your listings accordingly.

have a Good Luck

My thought is, always buy from ebay and not try it on a local coin shop. They need to pay rent and other bills to keep the shop, so usually, they need to make more profit than pure ebay seller who has no such burthen. You can expect that you are paying %13 + shipping more than the seller gets. But some sellers there are not selling for profit. They just need money and want to sell their collection for a higher price than selling to a coin shop. Moreover, at ebay, you can buy the one with the lowest price+shipping, which could counted as the market price, you can expect that you can sell it for more or less the same price to others at ebay by losing the 13% ebay charges. Bullion coins are different, always go to local coin shop to buy or sell bullion. And you still lose 10% to 20% of your money if you buy and sell on the same day.

My second thought is, don't buy from RCM, that is just a stupid way of losing money. No matter what, those coins will go to ebay some day, and the price will converge to its reasonable range 3 years after issuing. 90% coins you buy from RCM, their price will converge to a number lower than their issue price.

For coin storage, just a capsule and put it in a ziploc bag is good enough. If you want to feel more interesting, I put the bag of coins in a wooden treasure box for fun:)

At last, you can still make some profit if you hold the coins for long enough. For example, the economy is bad now, the market price of coins go downwards, you get some at ebay, and wait for 2 or 3 years when the economy recovers, collectors have more money to spend, and the price of coins will go up again.

From my research, commem coins and old circulation coins are the two types of coins worth the money. But old circulation coins need a lot of knowledge and grading skill, as well as a lot of money to enter the game :(

That's way too high. LCS would pay 30-50% of market at best. They have a huge overhead to cover and they cannot afford to pay much.for coins.

The best way to sell your coins for the most money is through ebay. It take time though. If you really need money right away or don't care the amount you get, then take it to your LCS. You see it all the time when someone dies, the heirs don't care they unload it for fire sale prices.