There are many places you can look online for repossessed boats. You probably want to limit your search by your area, but an example is www.yachtauctions.com.
There are many of repo boats available at any time. There is not a specific time that is better than others to buy a repo boat.
You can buy repo boats by contacting your local finance companies or in the Autotrade magazine. You may find them on Ebay as well.
Getting a boat that has been repossessed is a good idea if you are looking to save some money. You can try EBay, or http://www.boatboss.com/?search=Bank+Repo&all_locations=yes&catid=-999&view=ads to find repo boats for sale.
www.yachtauctions.com offers a weekly online bidding system. www.repoboatsdirect.com has an inventory that includes new, used and repo boats with fixed prices and financing available.
Most companies that have loans on boats will hire private businesses or individuals to go out and repo the boat that is passed do. One company that repos boats is Marine Lenders Service.
I was surprised at how many websites there were for buying repo boats. Try yachtauctions.com, repoboatsdirect.com, or boatboss.com. And, as always, you can always find local sellers on craigslist.org, especially if you live in a metro area.
Getting a boat that has been repossossed is a great way to save money. Ebay.com has auctions of a lot of repossossed boats available.
A friend of mine used yachtauctions.com, a national boat and yacht liquidating company to sell his boat. They offer a weekly sealed bidding system the ends on Mondays at 4pm Eastern time, and they have close to 300 boats available to bid on. Good luck!
www.yachtauctions.com is a great resource for repo boats. You may also want to try www.repoboatsdirect.com
Many boats are listed for sale on Craigslist.com by private sellers. Also, Ebay.com has many boats for sale.
There are sites out there that sell repossessed items, however, it is unlikely your friend will find his exact boat. He might be better served by contacting whoever did the repossession.
The Boats Online website offers new boats and used boats for sale in Australia. They are specialised in power boats for sale in Australia. The also offer specialised boat finance and boat insurance.