This is another category that can have huge variety in surf fishing. There are 2 main types of surf fishing reels, the baitcaster/conventional and the spinning reel. If you have never used a baitcaster i would say start with a spinning reel. Baitcasters can be very difficult and frustrating when starting and it will almost take the fun out of surf fishing(it will require some youtube and a lot of practice to get the hang of). If you know how to use one however i would say to use this, i personally like them better because they have more distance and less effort to cast in my opinion.
Size
You will need something that will hold at least 150 yards of whatever type of line you are fishing. Most people fish with somewhere inbetween 10-20 pound test for fishing so anywhere in between there will work. I use a reel that is rated for 325 yards of 12 pound test, but i run 15-17lb test on it and it has plenty on the reel. I would not try to cram it full of line as this will cause more problems with casting.
Quality
Here is where the price can go up, and will depend on you. If you are going just once and don’t have any need to keep the reel you can go cheaper here. If you are planning on sticking with this or just want to invest in something quality you can go more expensive. However if you were going to spend a little more money on anything i would put it here. Salt and sand are VERY rough on reels, even the most expensive ones will wear out overtime if not properly maintained. Do your research and read some reviews before buying. You can find good quality reels between 75-125. The 20-30 dollar reels might last but i have always had them break after a few times. Also a tip is when you come off of the beach spray it down with clean fresh water, this will clean most of the sand and salt out of the reel. NEVER lay your reel in the sand or saltwater, make sure to always prop it up or put it in the rod stand.