Perhaps you might find a deal on a seaworthy yacht in New Zealand during the arrival of the "Puddle Jump Milk Run" fleet. Many Yank sailors are ready to swallow the anchor and fly home after completing their South Pacific cruise-of-a-lifetime. Suggest you post some large laminated notices around some of the northern ports and you may just get lucky on a boat already tricked-out and ready to go with working autopilot, radar, plotter, etc.
Is the figure of $70K max USD or NZD? Morgans are cheap as chips over here in the Caribbean & Florida.
The best deals are rarely advertised but a very good source of info on a particular line of production yachts can be found at www.yachtworld.com
where you can see & compare lots of photos of popular boats and get an idea of their current market value.
Generally - a good time to find a good deal on a boat around here is during the months leading up to huricane season... or on an island that has just suffered a direct and devistating huricane hit.
I met a guy who went to Grenada right after Huricane Ivan and bought a seaworthy Island Packet 38 (as is - where is) from the insurance company for $11,000 USD. She was laying on her side with two other boats on top of her and he said that after the cranes were done clearing-out the rubble, they put the boat in the water and she started right up! He then motorsailed up to St Thomas (where I met him) to haul out for cosmetic repairs and he now has a fine yacht worth a quarter million dollars which cost him less than $20K!
Another way to find a great deal (provided you're handy with tools) is to find a slightly neglected boat with a dead engine or has been dis-masted. In these cases, the owner is ashamed of himself for letting the engine seize-up or rigging fail, they're tired of paying dock rental on a boat they can no longer use... they tried and failed - and they just want out from under it and take whatever they can get for it... often WAY below market value. In these cases, the depriciation in price if FAR greater than the cost of a new engine or rig. All you have to do is factor the cost into your budget and put a little effort into bringing her back to life.
I saw a boat limp into the Ala Wei (in Hawaii) who had broken their rudder in the process of loosing their prop shaft. The owners were scared $#!TLESS and tired from pumping for their lives for days on end. They sold the boat for a thousand bucks and two plane tickets back to California and my friend wound up with an awesome 42 footer for less than $5,000 - complete with new shaft, prop & rudder!
There are a lot of Great Deals floating around, languishing in the backwaters of most every port. Diamonds in the Rough just waiting for someone to come along and make them sparkle again.
If you put your heads into the search and prepared to pay cash - you'll go far... maybe even around the world!