Parts Prices, WTF?!

I buy & sell on this site most of the time. I've bought & sold on other sites also, but not near as much as here. If I see something for sale & I think the price is too high, I PM the seller & try to negotiate with them, the worst they can tell me is "NO". I will negotiate with buyers also, but if I have money in whatever I'm selling, I'm not going to give it away. I've made offers on parts & been told NO, & then put on the sellers "Ignore list". That's fine with me, it leaves me time to deal with others. I would like to believe that most people on this site are on the up and up, but I've seen complaints about people I've dealt with & had no problems. We are all human & prone to mistakes, but in the end, "YOU CAN"T TAKE IT WITH YOU".