if you bought a 150 / 152 today, do you think you could sell it for more money in the future?
I'd give that a conditional "Yes".
With proper maintenance the airplane should at least hold it's value. It's not like a new car that depreciates rapidly - the 150's and 152's are so old they've generally reached the bottom of that depreciation curve.
There's not likely to be any unusual AD's that ground the entire fleet (like the Beechcraft T-34's), and if the engine is not timed-out, then one should be able to sell it for about what they paid.
The only question mark I see is Light-Sport Aircraft. LSA's are perfectly designed to fulfill the 150/152's primary role as a personal putt-around vehicle. If LSA's take-off (no pun intended), they may drive down the cost of our planes. In other words, why buy decades-old when brand-new does the same thing? And the license is cheaper?
