I like most of that, though rank 4 seems a little useless on it's own. Being able to summon a retainer, but until rank 5 you can't use the markets, and until rank 6 you can't store things (assuming retrieve is also part of that, retrieve without store is somewhat counter intuitive) what else is there, aside from looking at them.

So just a couple of tweaks, rank 4 let me summon my retainer in the wild for storage/retrieval, working the markets in the heart of mor dhona doesn't seem like it should be a priority, but if I happen to have gear on a retainer and my group makeup is changing, we're losing our healer for instance, getting my gear for that would be the tits.

Also, I'm all for buy orders, if they're searchable by people looking to sell things quickly. If I can look through them and find that someone is looking for an item I want to be rid of, if it's reasonably priced I'd gladly fill their order to be rid of it, like Eve Online markets, but without the escrow scamming.