As far as I am aware, I have not seen any authentic designer handbags in Pattaya - but, I do see those knock offs regularly. If you need well known International brands, you won't have much luck in Pattaya.

However the Thai brand, Fly Now (plus some other international brands), has an outlet on Sukhumvit main road in North Pattaya Area. If you drive from Bangkok, you wont miss it on your right. They have reasonable selection of fine leather handbags which are normally sold for about 8000-15000 THB ,, but you can get them for much cheaper there. There are also nice clothes and beddings, I normally shop a lot more in Fly Now outlet than I do back in BKK.