I have a bnib set of old school German made MB Quart DSD 210's ...4" componet set...but I haven't really thought about selling them...I'm not sure if your looking for upper Quality or not...I was gonna run them with my 8" German made MB Quart midbass as a 3way front stage
I have a 4 ch Inifnity Reference (at 4 ohms its 4chx111watts, at 2 ohms its 4chx139watts) that I'm looking to sell along with all of the wiring (4 gauge power, speaker, and 2 sets of RCAs) for $100 + shipping costs. Specs are at the site below.