Take bank draft (in bank hours so you can call bank and confirm it) or cash.
Fill out new owners N&A on VLC (registration cert) sign it yourself and post it. (don't just give them the cert - both go to post box if it's an issue).
You'll need to price it low if you want to sell as the market is stagnant at the moment but you still should get more than a trade-in.
Look at carzone.ie etc. for current prices for your car / year.