Nearly 11 years ago, it was around $500 for a true cryptorchid(both retained, though not HIGH in the abdomen.) The only other retained miniature I ever had was gelded, nearly three years ago now, as a three year old, monorchid(I wouldn't wait that long again, not worth it, IMO--heck, the price of doing it was escalating every DAY I was waiting...). The vet's office had quoted a possible cost of as much as $900, should the retained testicle be 'way up high--luckily, it was not far above the inguinal ring, cost was around $250, complete w/ all charges. He stayed overnight, came home the next day, as I recall -and thankfully, I had a buyer who's given him an EXCELLENT home waiting for him, so I at least didn't lose on the deal, though I didn't really 'make' anything, either. I think I'd be afraid to ask what it is by now! (My 'rural' vet charged around $75-100 for straightforward castrations, done here on the grass-but he has retired from practice, and the next best choice out here 'in the country' is MUCH costlier.)
I, too, can hardly believe how reasonable this cost is for some(and by the same token, how high it also sometimes is....Wow!)
Margo