Jim,
I think the most effective way to get this done is your 5.8 for sale in the "Catamarans For Sale" section of the classifieds. Use the title "19xx Nacra 5.8 Sell or Trade", you could either leave the price blank which defaults to "Best Offer" or decide on a price you'd be willing to sell (better option) then if you sell use the cash to buy the 5.2.
In the description describe your boat in great detail and include all nine pictures, then describe the deal you would like to make.
Probably easier to find someone who wants a 5.8 and has cash than to find someone who wants a 5.8 and has a 5.2 that would be acceptable to you.
Good luck,
--
Damon Linkous
1992 Hobie 18
Memphis, TN
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