Are they profitable with average electricity costs?
ASICs also have resale value, but unlike GPUs timing matters a lot more.
Best case scenario: You buy a newly released ASIC straight from the manufacturer in China without insane markup from a reseller, mine a few months and resell it on eBay.
Worst case scenario: You buy an outdated ASIC from a reseller at 200+% markup. You mine longer than it's profitable and can't sell it afterwards because no one wants it anymore.
Of course, everyone wants to get the best case, so it is notoriously hard to get ASICs from the manufacturers right when they are released. Unless you have connections to China, or buy in large quantities, it might be impossible...