I've only purchased once and it was very recently but Tyler Manninen is genuinely one of the best sellers I've ever dealt with. As a UK buyer, the majority of my purchases come from overseas and alot of the time shipping costs can be a killer. But Tyler worked with me on the price of a Summer Glau picture and did me a killer deal on a couple of additional items too.
Some sellers can be a little pushy or borderline rude when asking questions, but not Tyler.

He was polite and courteous the whole way through.

Great quality items, great prices, quick shipping and great packaging.

10/10 from me.