PMMan:
If it is a new 3988 or in decent condition, you may want to grab it. I have bought 7 in the past 10 months (since I began collecting), and they are getting harder to find each month. Only the first one was new, off craigslist from a nearby home for just 90.USD.
Most of the 3988's have faded walls and some sort of damage....broken this or that or missing this or that. I believe it is one of the finest sets PM ever made, and have put those windows and frames in many other houses because that is my favorite window color combo.
They will make a fine garden center with a roof that is just a bit easier on the eyes than the modern house roof line. Have fun building with them, Pgal