Sunbird and OMC are both out of business. Parts can be a pain. Not the worst but occasionally you might run into something very hard to find. I'm working on a sunbird 188 (the cuddy) and his is a very nice boat and not in even near that good of condition. My personal opinion judging from the pics, 3500 seems like a fair price. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.