I have used, but nice parts for sale.
1) Lower door weather stripping( reproduction ), just a few months old, in nice shape. One side has a tear on the mounting hole. Most recommend using a black washer anyway, as this is common to reproduction weather stripping, as they do not have an integrated washer like the GM originals. $40 for the pair + shipping.
2) GM remote keyless entry( RKE ) module, in very nice shape. You would have to purchase a key fob off ebay to complete this install ( montecarlossforum). $40 + shipping.
3) Kirban billet vacuum block in very nice shape. This is for Power master brake setup, or vacuum brake setup that uses a "T" from the PCV valve, for a cleaner install. $20 + shipping.
4) GM front frame braces (F-41) ( jounce bars), in nice shape, with original self tapping hardware, painted with red engine enamel. $30 + shipping.
5) GM vacuum brake pedal with hardware ( bushing, bolt, washer, clip ) in great shape. $40 + shipping.
6) GM power trunk release solenoid with correct button and bracket for our cars. AND a smaller, newer version of the button that you can flush mount anywhere you like.
All prices are plus ACTUAL shipping charges. PayPal ( friends & family ) or add 3%, I can ship next business day. Any questions...let me know.