Tip number 5: Be very, very wary of sellers over-pricing Retro Black Holder coins. The coins themselves are only worth their metal content and face value, so buying RBH coins for $100 more than the coin in raw form is worth is a very bad idea, UNLESS it is a rare or scarce date, or an error coin. But use caution when purchasing RBH coins. Dealers and sellers are making people think they are worth something now, but in reality, you're paying all that extra money for a piece of black plastic.
Beware of sellers using small stickers that say "same as two pizzas". Two pizzas depending on who's selling them can be anywhere from $10 to $50 or more. Plus it's too much carbs!
You are not stepping on anybody's toes. Most collectors (including the one that posted that toned proof seated dollar) do not have the requisite skills to differentiate questionable toning from market acceptable toning and should not be buying raw rainbow toned coins on E-Bay. It is a fools errand. However, I think your reasoning for avoiding rainbow toned coins is a little far fetched. I would like to see some examples of what you are talking about.
I don't know man, have you seen those pepperonis lately? They look like heavenly 1892-O masterpieces! You know you want some lol.
Here are some tips. 1. Don't buy anything from people with 0 feedback, let someone else take that risk. Avoid at all costs if the deal is too good to be true. 2. Stay away from anything that says [insert grade here] details. These are problem coins. 3. Never buy unsearched rolls. Exclusions are original bank wrapped rolls of silver coins. But even then you might get burnt. 4. Stay away from sellers that "juice" their images. They play with the color settings to make a coin seem better than it really is. 5. Never buy raw coins unless you know what your doing. Over 60 million coins have been graded. The amount of good n' raw dwindles by the day. While there are still good raw coins left, buy them from sellers you can trust. 6. Poor photos can be good, and sometimes they can be bad. It's like the lottery. I've bought coins with bad pics that look amazing, and I've bought coins with bad pics that make you puke. 7. Stay away from coins that have been cracked out of their holder. Unless you have photo proof from the TPG, you have no idea if the coin shown actually was in a slab at one point in time. 8. Never buy coins from China, for obvious reasons. 9. Sometimes better sites have a better selection of coins. Ebay seems to be a dumping ground for raw problem coins. I like the auction site great collections.
I got burned on a bunch of "unsearched" wheat rolls once. I sent them back and got a refund, minus shipping. Feedback is a big one for me. If you don't have near 100% positive feedback there's a good chance I'm going to steer clear of you. Ditto on zero/low feedback.
As for selling, I've learned watchers don't mean squat! I had 21 watchers in an item I listed, when all was said and done only 4 bidders.