I ordered a laptop motherboard for $184. It arrived with a thermal paste patch on it and when I asked the seller what was it he claimed it was just for protection during shipping. When it was installed laptop would start but then would immediately shuts down. Seller asked to return it but when he received it he claimed it was broken when in fact I made sure there was no way it can get damaged during shipping back. Customer support claimed the seller provided them with evidence it was damaged but they never showed me his evidence. I tried to make them understand it was defective when I received it and the thermal past was put by the seller because he knew it was overhearing. I tried to convince them thermal past is used to reduce the overheat and they can confirm my claim with any electronic engineer. They simply ignored this fact and closed the dispute in favor of the seller. Result is I lost $184 for the item plus $20 for shipping back. Have you ever wondered why would Aliexpress give their sellers a an extended time (10-20 days) to ship. Simple it is because their sellers sell something they do not have and if they can not provide the item they give them the option to cancel the order with no damage or penalty to them. Bottom line this site and its sellers are nothing but a Chinese crooks. I have been with eBay for the last 8 years and nothing like this has ever happened to me so i decided to stick with a legitimate site and never deal with such crooks anymore.