I have gamed both Mizuno and Titleist, and both make great clubs.
Bought a used set of MP-33s for $120 a few years ago. I played them for about a year and really worked on my swing, which you pretty much have to do to hit blades. Great clubs when I hit the sweet spot, and helped fix my swing. The following year I bought brand new MP-52s, and I love them. The feel is great, the offset is minimal, and the muscle/cavity back provide a little more forgiveness than the blades, but still the workability.
I guess I just wanted to throw my two cents in there as far as maybe there are other options than just the blades. There are some cavity/muscle back clubs with minimal offset and offer some forgiveness without losing a ton of workabilty. Not sure if this is something you've considered.
Side note - I did get $75 for trade in on the MP-33s, and probably woud have got $100 on CL or something. So like previous posters noted, if you don't like them, at $100 they pretty much hold their value because there's always someone willing to pay $100 for a set of good used blades.