Blisters are almost inevitable in older boats, are relatively easily (if not inexpensively) dealt with. Two inches across is indicative of a failry serious condition, but it's the depth of them as much as the size that's an issue.
Cored hulls are more problematic with large blisters due to the thinner FG outer skin.
If the price reflects or can be adjusted to reflect the cost of a proper peel/barrier coat job, you could well end up with an excellent (improved) boat where resale could be enhanced by the fact that a proper blister repair job has already been done.
Worth checking, though, is whether these large blisters are indeed in the laminate, or are paint blisters (or in a poor attempt at a barrier coat). I've seen this occur before where blisters "came back" in a year, and it proved to be poor adhesion of a barrier coat after a blister repair.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)