I've got two 92Ah 12V batteries that I'd consider selling. They're these ones:
Enersys PowerSafe 12V92F - 12V 92Ah VRLA Battery £0.00 - Industrial Batteries - High Rate VRLA - Enersys V Range - Front Terminal FIAMM Batteries | C&D Technologies Batteries | YUASA Batteries | Enersys Batteries | Scooter Batteries | Lawnmower Batte
I've barely used them, but had them a while. I've charged them every few months though to stop them degrading. No idea what they're worth..

For the solar panels you're best off looking on eBay. A few months ago I got four new certified 190W panels for £120 each, then another two the same for £100 each. They're now on the shed roof and grid tied with an inverter also from eBay.