Quoted from gweempose:

I get where you guys are coming from, but it seems kind of silly to get upset when people are simply adhering to a widely accepted convention. Obviously, we all know that OBO stands for "or best offer", but the reality is that very few people use this term literally. Does anybody really expect someone that lists a pin as OBO to sell it no matter how low the best offer is? Of course not, and that's because we all understand that the term has evolved into something much different than its literal translation.

Quoted from nighttaco:

If a seller has a game listed as "FIRM" and you don't like the price, then just move on, not the game for you. There doesn't need to be hurt feelings, and if it's priced too high who cares, they will just sit on it, no big deal. I personally am sick of the CL auctions people try to have with the old "I've had better offers" speech. My time is definitely valuable and would much rather buy a firm priced pin than deal with the other bs.
As far as "Mods" go, they are to personalize your item, car or whatever, it doesn't usually add value. I can tell you in the car business you will lose value because your car is "modded" in most cases. People want to mod things their way to make it theirs, not your way. I do my Led's in my game my own way and don't buy kits, same with my cars, computer, etc. I have my own taste and other people have theirs, don't expect to recoup money you've spent "customizing" anything...