I actually bought a 5 bedroom house with NO bathtub once. But I will tell you that we got it for far less than comparable homes in the nieghborhood and I'm sure that's why.
Yes, we had some bathroom remodeling done. Until we did my daughter fit nicely in the huge laundry room sink for baths.
As far as re-sale value... it's a tough call. Around here if you had sold a year and a half or so ago it probably would not have mattered at all. If you were to list now it would be just one more reason to ding you on price.