Wow, I'd be really nervous. First of all, I'd prefer to see a website where the quilter has lots of pictures of his/her work. I'd want to talk to other quilters who have used this person's services. I'd want to talk to the quilter and get a feel for how he/she deals with issues and difficulties with the quilt, how experienced they are, etc. I prefer face-to-face meetings so he/she can see the quilt and any possible issues with it, and we can discuss pattern, batting, quilting density, etc., and also so I can get a feel for his/her personality and competency.
If I was going to use this quilter, I think I'd start with something that wasn't that important to me, so I can get a feel for this quilter's skill level. $35 for a twin seems awfully cheap to me.