Audio Technica cartridge bonanza Multiple AT155 - ATP-2

If you're here, you know Audio Technica quality.

My Audio Technica inventory. I don't use phonograph records anymore. 
1) I used to be an engineer in the Pickering/Stanton Engineering Department. I know what I am talking about.
2) Buy with confidence. No rip-off here. Honesty.

The Audio Technica line of cartridges came about as a result of the challenges of the CD-4 "Quad" as it was known back in the 70's. There was a 30Khz subcarrier embedded frequency that carried the surround channels. Audio Technica came out with a line of cartridges that responded to 45 Khz to easily track the CD-4 subcarrier.
For plain 2 channel records higher frequency response = faster rise time. I could have had any Pickering/Stanton cartridge I wanted but Audio Technica was far superior.

This sale contains
-2 AT155 cartridges. One with a new 150 Shibata stylus, and the original 2 Line Contact styli. The original styli are in excellent condition but the compliance of the stylus mount o-ring is not as good as new. Probably no one would even notice.
-2 ATP-2 "Disco cartridges meant to be backspun. Very good sound as well.
-Cartridge mounting hardware assortment
-Stylus pressure gauge
-empty bottle of AT stylus cleaner
-AT20SLa box from cartridge I sold off earlier
-Telarc Omnidisc box set. Box fair condition, manual and disks in pristine condition. 

All priced based lower than what I see selling on Ebay. If I'm out of line, I'll find out.