I value hearing your experiences, that's why I ask before doing. I'm astounded that four good used springs for $100 is not a good usage of my money. If they were $50-75 would that make more sense - just as a back up plan? My intention is to always have air. It just seems so cool to be able to lower it at speed, and for my driving where the cloverleaf off-ramp at 60 is about as radical as I drive, it does fine. Besides, were all things equal, won't a full bushing re-do and new rear shocks make it handle as well as I would ever need? What is a fair price for a decent set of used bags? A local is advertising a parts car for $1000 that he says has head gasket "issues" but still runs. Overheats after 20-30 minutes. It's a twin for mine, however, and all seems operational. Even the lights. Spendy for just parts, but they don't make them anymore, either.