reasonable unless they are doing a total trash job and using poor materials (there are very different types of glass and backing and matting, some backing is not acid free and is really bad and some is museum quality acid free and so on and so forth and on).
framing is horrendosuly expensive, more horrible than you can imagine, truly top quality for 30" range can be practically your entire sum for just a single print, it's hideous
your prices mentioned are actually on the lower side, if anything
what types of glass and materials do they mention?