Hi lots of shopping options for Phuket. Weekend markets in Phuket Town start about 4-5pm. A lot of things here are a lot cheaper than in Patong so best to price stuff at markets in Phuket, then head to Phuket Town markets. If they don't have what you want then buy it later in Patong.

You have the Otop market near the Patong Merlin but lots are people are commenting on the rude treatment they have received from the Burmese traders. (not Thais who numbers are dwindling here).

Also have a couple of Ocean PLaza department stores and the big Jungcelon store. Also lots of stalls along Beach Road.

Departure tax is included in ticket price now.

Cheers

Karin