We ordered a $600 laptop from this seller, only to receive what appeared to be a display model that a kid had been banging on with their elbows. It took forever to boot up, would frequently freeze and restart, etc. We returned it... but the seller only refunded $50 and kept the rest!
We complained but all our emails were ignored. Upon further research, it looks like the laptop might have gotten lost in the mail and took a while to get to them, so the store used that as an excuse to basically steal $550. Meanwhile, they've ignored around half-a-dozen emails from Amazon, as well (though I suspect Amazon is too big to care).
No doubt, PCOnline will just "refurbish" the defective laptop and sell it again -- meaning they'll probably end up making around $1,000 on a piece of crap laptop, while we're out close to $600 (after the return shipping), not counting months of stress and inconvenience.