Vortex Sound Research

Where in internet land would be the best place to buy used modules? A dedicated modular marketplace, does it even exist? Something other than reverb.bull$hit (low price + $299.00 shipping) give me a break. Sorry if I’m missing the obvious place to go, I’m new to this sub and just ordered my first case + power supply. No actual modules yet. Headed to the perfect circuit showroom today.. but those prices are all very… néw. Which is fine, just want to know if I have any options. Thanks for any advice/direction, folks.