My myson orion boiler is leaking,?

My myson orion boiler is leaking from one bottom corner,i do realise/have been told this boiler is around 25 years old,but,ive never had any problems with it until now,it was already in the house when we moved in 13 years ago,then we decided to buy the house from the council,alas no more servicing etc,the guy who came to look at it was a friend and was once corgi registered but no longer is retired now,the boiler still worked even with the leak,but he drained every radiator and said i needed a new one,havnt really got the funds for a brand new boiler,was wondering if it was repairable,it also ran on economy 7,was a great boiler,any feedback appreciated,thanks,