check into a new left over Johnson, or something. They are fair price and they have warr. if you install on your own.
I Boats has a 03 Mer Optimax 150 25" shaft program motor with a 90 day warr $7,600
They also have a refurbished 01 Yamaha 150 20" shaft for $6300 with 60 day warr.
Heres there link:
http://www.boatmotors.com/rebuilt_outboard_motors/
There is also a 97 left over Evenrude at Doug Russle Marine NEW!! $5,650 25" shaft
and a 98 left over 150 25" shaft rebuilt for $5900
Hers there site:
http://www.dougrussell.com/Products/...&SubCatID=
I am sure I can find more if I looked harder!! But if your going to spend that kind of cash you should get all you can get and a warr also!!
Good Luck!!