TISSOT SEASTAR retailer 1000 CHRONOGRAPH

Product Name: TISSOT SEASTAR retailer 1000 CHRONOGRAPH
The Tissot Seastar 1000 is the ultimate watersport watch, with its high water-resistance up to a pressure of 30 bar (300 m/1000 ft), screw-down crown and caseback as well as its unidirectional aluminum retailer bezel. I got this watch from an estate along with others. I am NOT a watch expert and don't know the true value of this watch used. I based my listing price from the website selling it for actual cost and on the inside strap it looks as if it needs to be cleaned(see pictures) I have not tried to clean the watch or anything else. If my price isn't accurate for this type of watch please feel free to submit an offer. Nothing is broken on it but I do know that it needs a battery since it's not ticking.