How come when I’m the first/only one to purchase something I’m told I got a deal going????

I’m pissed. There needs a rule if you have something posted and don’t mark it as pending/sold right away you can’t post any classified ads for a month. I’ve gotten this sxxx to many times already. Or do like I do and just post it here or here first. I’ve purchased a lot of stuff on here in the short time I’ve been on here. I don’t have these issues on other sites.