Yes guys be careful. I'm pretty sure there's no bug involved here. I'm positive those rats sellers do that on purpose. For example; a 3 page stall have all ratz for sale at 4,200 and then one of them is actually priced at 42,000. All of them except one stack is like that so if you are buying more than one stack, it is very easy to buy it without even knowing u just spent 4 million for ratz lol. Just be careful next time. I don't think Zankza can do anything about this.
p.s. this actually happened to me today: someone had a lv3 acc pet stalled as $750. Yes lol 750. I'm pretty sure he meant 750k. Sucks for him