Doubtless somebody will be happy to sell you last years on eBay, just search. However,you need current charts for flying and having slightly different ones that you may inadvertently switch them with isn't clever.
However, if you are flying light aeroplanes (as opposed to microlights or helicopters which tend to be slower) then you only really need the 1:500,000 ("half mil") charts, and the quarter mils are only nice to have.
There are cheaper half mil Jeppesen charts - and personally I much prefer them too as clearer and less cluttered. However, I'd not recommend them to somebody learning - the training and exams are all built around the CAA charts and using Jepessen charts will only confuse things.
G