The later model 208s weight about 200 pounds more than earlier model due to ballast added to compensate for the extra weight of the 4 stroke motor.
As to gross weight, bigger is better to a point but too big can be a problem mainly because higher capacity trailers are typically longer. You need to make sure that not only is the load rating correct but also that the transom to bow eye length is correct for your hull. Usually a trailer in that range will have about a 2 foot adjustment range. If your boat doesn't fall into that range, you may have problems getting the tongue weight correct.
Right now at least in my area and surrounding areas, both new and used trailers are hard to come by and are commanding top dollar.
You also need to determine if you want or need a roller trailer or a bunk. Look for disk brakes, stainless if you can. For that hull brakes on one axle will be fine. Aluminum frame is also a plus especially if you boat in salt or brackish water.
Note that if the tires on a used trailer are more than 4 or 5 years old, they should be replaced regardless of the tread wear. The date of manufacture is on the sidewall.
Trailers in the length you need weight about 1000 pounds give or take. If looking at used, look for the GVWR value. That is the max load the trailer is rated for. If you see the figure for GVW, that is the max load carried plus the weight of the trailer.