depends what they are. As an ebay seller with little feedback and no relevant transaction history you will probably have a hard time selling high end watches. You will probably get raped going to your local buy/sell operation. You will also have a hard time selling through forums since you have no posting/transaction history. If they are liquid manufactures like rolex/ap/iwc/omega/etc and you live in nyc/san fran/boston/a select few other locations there will be a reputable dealer near you who wont gouge you quite as badly. Best bet is probably to determine their fair market value, and then try to negotiate with brick and mortar guys towards that value. There is a question of time value obviously, the amount you are getting gouged for may not be consequential to you. You may also consider listing them on WUS/TZ etc at an appropriate discount to fair value which compensates for your lack of rep. The more expensive the watch, the more people are inclined to 'buy the seller' so the bigger this discount may have to be.
PS If you have any Rolex/IWC i may be interested