Since this topic seemed to get "reactivated" with a couple of posts. I'll add my $.02
My first unit was an '89 Class C. Similiar to a previous post, I found out quickly that we were in "separate" sleeping quarters as my wife counldn't stand the cabover. But, I bought it used and it was cheap ($15K) at the time so it met my needs as something to "test the water" wtih. The original poster stated that you need to buy one first to realize what mistakes you made. I agree somewhat in that you need to RV before you know what will meet your needs and what you want. Purchasing an older unit first has it's advantages and disadvantages. At least it's inexpensive and probably past the major depreciation curve so you won't lose much selling it. HOWEVER, if it's your first RV, and an older one at that, the fix-it headaches might discourage you from continuing. For us, we moved too quickly into unit #2. A GB Pursuit. Looked awesome when we bought it, but, in truth, it's their cheapest model and it showed quickly. Fortunately, we got a great deal on it and I sold it for only $5K less than I purchased it for after 14 mos. and 20K miles.
For some, a couple of rentals at $1500 to $2K might be a much more cost effective way to sample RVing before buying a unit, deciding after a year or so that it's not right and taking the deplreciation hit.