HI There, New & Mainly Looking For Advice 4 Coins 4 Younger Family Members

Hi everyone!
this forum is always the best for informative experienced answers, which is one of the reasons I have finally decided to jump in the mix.

First off I have been a short time collector of coins (about 15 years, my father and grandfather were collectors as well) & recently have gotten into buying mint products for my nieces and nephews they seem to really enjoy them and its peaked their interest in the hobby. I find the modern mint products are more approachable for kids as introduction pieces while selecting the right ones helps to retain some value of investment for them as well.

one of my main questions was going to be where the best place & trustworthy to find mint products (aside from the mint), also if anyone has had experience with a few websites I have found recently, one being an auction that has many items and they seem to be very cheap as far as I know comparing to the standard fair market I usually see on these however I have bid on auctions before on places like ebay and even heritage but there are vast differences between the 2. I would like to purchase some of the products I have found on this one and would just like to know if anyone has had any experience mainly with the auction hosting site or with any of the single auctioneers that post on the site. I don't want to post the links here as I am not sure if that is allowed and I do not want to break any rules as I plan to be more active with this community if there is any suggestion as to how I could ask on this specific one, any help would be appreciated.
Glad to finally have my account registered and excited to get involved thank you for having me :)