I used to have a thin skin and would let it all out in some of my post but I do not do than anymore. I try to make my post at least helpful.
I will agree, I was going to quote some of the things you had said to members here and noticed they were quite a while ago.
Not being an ass here....... just trying to be helpful, but here are a few suggestions.
1. Don't get into name calling with people, you end up looking like the bad guy even if you are not.
2. Quit bragging about how many games you got, you may be proud of them but think for a second.... when someone gets a tempest they saved a couple of months for and wants to show it off, the last thing they want is to have you in the thread telling them you have 16 of them in your warehouse.
3. Don't try to sell stuff in the general section, and yes..posting a picture of the cool new neo geo you got just so everyone can see it oh and BTW "it just happens to be on ebay, why don't you look at it there?", is trying to sell.
4. Do not offer to "make a deal" with someone when you know they are looking for a price you are not willing to take. For example, if I say I want a generic jamma cab with no board and no idea if the monitor is working, you have been on this board long enough to know $75 to $100 is more than enough unless it is something special. If you would be up front and tell people "sorry but I can put a board in that and get $800" then no one would care, instead you offer a "deal" then everyone gets upset when you try to get more than is expected.
I bet if you stop these things, a rlevin hate thread on here would be as rare as a reasonably priced game at your shop.

Sorry had to take one last shot.