Kev,
My first truckmount was a Prochem 75 HE, and a fine machine it was. The only problem I thought was the temperature was rather low.
Totally realiable and very easy to do the regular maintenance on.
I would check the hours if I were you because 1000 seems very very low.
I sold mine for £2500 with more than 10000 on the timer about 5 years ago and I recon it will be still be earning money.
If you need any advice about the 75 after you have bought it let me know.
Regards Tony Harrison.