Not sure if this is the right forum for this subject.

I’ve recently got into the bug of collecting comic artist portfolios.

I’ve got the Jim Lee and Frank Cho portfolios on pre-order, recently bought the Artgerm one and picked up a Superman one from a comic dealer at home

Is there a list or site that lists who’s released portfolios of their comic art?

I’ve seen a John Byrne one on eBay where he’s redrawn some of his iconic X-men scenes which I’m after and also a history of the DC universe one for the Bolland Arthurian Legends, and Bissette Swamp Thing.

Does anyone else collect these? What are your thoughts on them?