Once you get more posts, you can ask for a website review.
A couple of things though, Pr doesn't bring rankings in the search pages, it is a measure of imortance, not relevance. Simpley getting a higher PR will not by itself bring you rankings.
You have an auction site, so you are up against ebay then
HUGE task IMO. but it can be done.
You need backlinks using variations of your target key words. you need lots of backlinks also.
personally if I had an auction site I would be looking at getting traffic from suitable sites rather than trying to get ranked in the SERP's.