Which is the best site to sell used but perfect M&K K7 and K4 home cinema speakers with K9 subwoofer

I'm new to this site but I'm hoping that someone can advise where I can sell used Miller & Kreisel home cinema speakers: 3x front K7, 2x rear K4, 1x K9 subwoofer. I live in Glasgow and bought them from a specialist audio shop around 15 years ago but they are in perfect condition - only used for TV mainly. I'm selling them with the Pioneer Multi-Channel Receiver (VSX-D912) I bought to go with them. Not sure if this system is worth much to anyone given it's age but it's great kit and was top class back then (it cost a fortune!). Does anyone know if there's a market for quality older kit like this? Hope you guys can help as I need to sell in the next two weeks (I'm moving).