I think the resale value has more to do with the overall market than the brand. Designer bags in general (with the exception of the LV neverfull) are garnering less in resale value. I think it's a combination of the economy and buying trends of younger buyers. Getting a great deal on a PS1 is pretty fantastic, and the style continues to be on trend--other brands still introduce their versions of this bag (satchel, top handle, divided interior). I think that PS is still the most contemporary interpretation of that design. I have a PS1 medium in smoke and a tiny PS1 in midnight, and I continue to carry them both regularly. Of course, you should buy what you love--in the end, I don't worry about what others consider on trend; I buy based on my own style and my needs. Good luck!