I think that if a stack of 99 is available on the market board and we like the per unit price, but only want to buy say 5 then we should be able to buy 5 from a stack of 99 leaving 94 available to sell. Very beneficial your products sell faster and more reliably while buyers can get what they want. This also helps crafters as they can leave a stack of 99 and know that some of it will sell as opposed to the status quo, which oftentimes leaves people selling a stack of 99 not being able to sell at all, unless we use separate low quantity stacks, and when you only have 40 spaces to sell that is a big hurt on you for not being able to put your products up on the board for sale. Being able to buy X ingots at a time from a stack of 99 would save everyone a large headache.