Dumb question about doing 3d modelling work.

I've done a lot of modelling for my own projects, but never for anyone else. I thought I'd look into doing some modelling work for extra cash. I just bought TGEA, so I'm still learning about exporting into dts and such, but when I'm ready to start looking for some modelling work, I'm not sure what to expect. I was reading the job opportunities section and I noticed that sometimes people take bids - and obviously they won't say, "THIS is how much we're paying for models". My question is, when I'm ready, and I have samples for show and everything, around how much should I expect to make? Assuming my work is good and I know what I'm doing, but I don't have any job experience or references yet.... I have no idea what I should ask for. What kind of deal would a person typically be able to expect? Just some sort of range or a ballpark idea is all I'm asking for. Thanks :)