Wot Jason said, it’s a gamble!
AliExpress is a marketplace, not a vendor. They facilitate trade between buyers and sellers, and have little interest in products, good or bad. A machine tool might be offered cheap by a decent manufacturer who has over produced, or someone might be selling factory rejects or returns. Genuine bargain, or horrid disappointment, the customer finds out when he opens the box!
Asking about AliExpress experiences on the forum isn’t much use because the sample is far too small to be meaningful. A few chaps saying it went well or badly for them doesn’t prove anything. A better source is TrustPilot, who, based on 140,000 reports, rate AliExpress 2.5 stars out of 5 (poor).
The reason isn’t black and white. 75% of reviews give AliExpress 5 stars, that is a high proportion of customers get what they wanted, hurrah! But look closer. The worry is the 17% of customers who only gave AliExpress 1 star: they represent transactions that went wrong and failure to sort the problem out. If anything goes wrong, the deal can turn nasty. Unfortunately, UK consumer protection doesn’t apply when buying from abroad, leading to many potential problems. For example, not unusual to find refunds are only given after faulty items have been shipped back to the seller, purchaser pays. Therefore read the small-print carefully, and understand the extent to which it will be difficult or costly to get restitution.
As a gamble, TrustPilot suggests there’s a 75% chance of winning and a 17% chance of losing. (Coincidentally, these odds are slightly worse than playing Russian Roulette!) Nonetheless, up to a certain size of stake, I’m happy to risk buying from AliExpress and similar, eyes wide open to the possibility I might lose my money. I generally stay below £100, but it depends on how badly I want the item! Others would risk less, and some much more.
In principle, I suggest gambling isn’t a good way of saving money, though it depends on the odds and one’s risk appetite! In this case, a 17% chance of losing £2000 versus a 75% chance of saving a few hundreds doesn’t appeal to me, especially if I was already scraping the barrel to pay for it. I’d rather pay extra to a UK supplier, who will sort it without too much hassle in the event I get a dud.
Dave