Which Grader Should I Use To Submit 2 Coins?

A 1829 half dollar and a 1921 morgan are the two I want to submit.

I brought those in with a lot of about 5-6 others just to see if he could value anything. The guy took a look at the items for about 10 seconds and offered $10.

I've already posted both coins over in the coin grading forum! :)

I just want to do it for my own benefit to protect them and to have a rating such that it gives me a general idea of the value. Not just today's value, but years down the road. If I know an exact number 1-70 that it is graded, I can look up the value of similar examples.

First, welcome to the forum.

Second, I agree with GO, stay away from that dealer, the melt value alone is worth more than what he offered.

Third, I looked at the coins in the grading section and I think everyone has given you pretty good grades and advice. Slab if you will, but typically I like a coin to be more valuable than around $150 to submit. For individuals like us that get things slabbed, we need to be more selective since we don't get the bulk submission rate. If the 1829 is cleaned, you would need to submit to ANACS or it will not get graded. Then you'd be out the grading fee with the coin still not in a slab. So, in a nutshell, if you have your heart set on slabbing the coins, I would recommend ANACS. This is just my opinion for your circumstance.

Dealers like those give the business a bad name.
However, I would still follow the suggestions that I, along with a few here have given you. Don't slab the coins you posted. They are common date coins and not worth the extra cost of certification.
A lot of novices, myself included, felt the need to slab a lot of coins when I first started. Now, I just limit it to key/semi-key dates that are worth the high cost of doing so.