I have 4 sets of brand new, never used, McMaster-Carr part number 13875A53 16 inch full length stainless steel drawer slides.
I paid over $50.00 a set plus shipping.
Priced as follows:
All 4 sets, $100 shipped
3 sets, $85.00 shipped
2 sets, $60.00 shipped
1 set, $32.50 shipped
Paypal is OK...