My nickel is on O'Day 22. Shoal keel, rounded cabin top, windows look about right, reverse transom.
When you go to the picture, click on the word "sailboats" right before the ad id. Just a couple down the list is another O'Day 22 for you to pull up the pics and compare.
p.s. Tony wants 3000 which seems a little steep, so there should be some wiggle room