I managed to assemble a cheap old dell with plenty of old RAM. It lasted me nicely until I had my 40th in April. Then I got a load of birthday money and used it to build the nice PC listed in my signature.
As for the old Dell... My brother-in-law has an old knackered PC that he dropped off last night. I'm gonna see if it's salvageable. If not, I'll let him have the Dell on long term loan, conditional that when he finally gets a new PC or mine breaks again (hoping that won't happen, but you never know), I'll get it back.
i5 4440 3.1Ghz, Asus H87M-E motherboard, 8GB DDR3, 2GB DDR5 nVidia card, 2x500GB Seagate hd, Coolermaster 750W PSU running Mint 17.1 MATE and Win7
HP mini, 1.66 Ghz Intel atom processor, 2 GB DDR3, 320 GB hd, Mint 17 MATE