Hi John,
A recent change to vehicle registration rules in the Republic of Ireland will come into force this summer. Under this new system, the registration tax will be based upon the emissions from the vehicle, rather than the engine size. Therefore all new cars registered in the Republic after June (and all used cars imported into the jurisdiction) will employ the new system of taxation.
Since the government has announced this change, it has been highlighted that buying an "emission efficient" car in the UK, and bringing it to Eire could result in significant savings into the thousands of euro. In terms of yourself John, I cannot believe you could sell your car for less than I paid for mine. Perhaps that is the going rate in the UK, but in Eire it is worth considerably more. Check out
Find A Car, Buy A Used Car, Used Car Ireland - Carzone for asking prices for all models of cars in the Republic. Subtract a couple of thousand euro from the asking price to get a more realistic idea.
John, there are already many Irish people buying cars in the UK and bringing them back to Ireland. You should investigate the possibility of courting such buyers, perhaps by listing it on a website. I'm not an expert here so cannot give you great advice, but don't sell your car for less than €27,000!!
Good luck,
Michael