Guild Wars 2

Is there one or unlimited?
When you get gold from sales, they money can’t be collecting untill you remove all the items that were brought before the sale, which sucks.

There is a limit on the amount of items shown yes. I have not actually found a limit on the amount of items that can be put in it at once and I trade 10000’s of items in a single session (overnight).

I’ve had it happen several times where I click ‘pick up all items’, I get all items, then a new list of items appear. click ‘pick up all items’ again, get the new items, new list of items appear. click ‘pick up all items’ yet again, get the new items, no more items to pick up.
In all 3 times, there was a mix of moneys and items to pick up
I expect that it saves a certain number of transactions (maybe 100?), then starts a new group of transactions. When you pick up the first, the second is then shown for you to pick up.
I do not know if there is a limit to the number of groups, but I have had up to 3 before.