I’m debating whether or not to buy the trap on Monday as I’ve spent a LOT on everything else for my cosplay so far (a proton pack and ECTO goggles being the big expenses)… I was figuring I could probably skip this sale and wait for the next one.. but now that I think about it, when was the last time the PKE went up for sale since its release? Was it only one time? I honestly don’t remember. Probably would be good to know in making my decision before it’s too late! 
ABSOLUTELY NEVER.
There was there mystery box thing they did where people got PKE’s in their box, but that wasn’t really a direct sale of 'em.
If you want a trap, BUY IT NOW. Otherwise you’re gonna have to pay double or even triple for one on ebay when they sell out from Matty.
Or just build your own.
Yeah I was concerned about the price gouging on eBay (which I would never fall for). I just found a means to order on Monday though, so problem solved! 
Well IIRC, the PKE went on sale on a Monday and didn’t sell out until the Wednesday or Thursday. Who knows this time. I was lucky enough to get one on eBay before Christmas and it only cost $90, which weighed against the original cost ($60ish) and original s&h and then listing it, etc… the seller only made maybe a $10 profit. Might be like that with the Trap, might not be.