I think you've got a reasonable idea here and I hope it works out for you, but honestly it doesn't look like your models are that good. They're not like terrible or anything, just very plain. I might pay someone $1.50 to make a very nice model that I couldn't do myself easily, but I definitely wouldn't pay for one that simple. I certainly don't speak for everyone, quite a few people (elm comes to mind) would pay for cheap/fast work. But, I think you could get a lot more "business" from people like me if you were more advanced at modeling.
edit:
Maybe I didn't read the topic right, but you said you're willing to be paid to make models.
Do those models include everything he/she needs to export said model into game or have you covered that, honestly if I was doing this I wouldn't model something for someone and expect them to know what to do with it. That's just like giving a baby an unopened can of baby food and expecting him to eat it.
This is a good point. In all likelihood, people who will buy from you will not know how to do this themselves (because if they did know how to get it ingame chances are they would know how to model too)