Original sentence: Also, for warranty service, manufacturers usually require a receipt to show proof of purchase.However, stores commonly offer to give purchasers a discount if the purchaser does not take a receipt, thereby allowing the stores to falsify their VAT tax reports.Note that this is often a bad deal for the traveling foreign purchaser, since the purchaser would have been refunded the full amount of the VAT at the airport, and the "discount" is invariably smaller than the VAT tax would have been.Prices on new hardware such as digital cameras, printers, computers, and other electronics can be significantly lower than in Western countries, but products are often factory seconds or refurbished goods.Stores are supposed to add VAT of 7%, which foreign purchasers can get refunded when leaving Thailand at the Bangkok airport
Edited sentence: Buying new hardware like digital cameras, printers, computers, and other electronics is a really good deal because the prices are good.If you buy in one of the big stores they will add on VAT of 7 % which you can get back when leaving the country at the airport.When buying at a small store you can get the merchandise cheaper if you do not need a VAT receipt, but remember for Warranty you will need to show a proof of purchase