I have some bazooka 5.25" coax I'll sell for 35 US shipped. They are working 100%, a few years old but have only been used for about 1 year. I have them in my basement now.
let's see... 3.5" Delco, 4"x10" Delco, and 6"x9" (whatever company makes speakers for Dodges), old JBL computer speakers, and a few other random speakers... name some prices
I have an auction on ebay for some Boston Acoustics. They are 6.5" with one inch tweeters. I paid over 300 a pair brand new. They are used and only taken out of my car because my amps were robbed. Here is the link.