Beware.... I suspect that there is NO such thing as a cheap Porsche, as no matter which "lesser" Porsche one might buy into, the parts prices can seem no less costly than for the top end of the Porsche market. 50 years ago I priced a valve spring for my then 912, (cheap 4 cyl version of the 911) each valve has two springs, an inner and an outer, the same set up as many old m/cycles.... The price back then for for one valve pair of springs was £25 while at the same time a full set of valve springs for an MGB was £14..
A good MGB is a far safer bet than any Porsche in terms of maintenance and repair, the early 911 derivatives in the form of the 996 are complex machines with known potential issues, and any air cooled seem to be attracting crazy prices. If your MG`s have all been B`s then perhaps a GT..?
I spent more on having my 991 serviced in the first year of ownership than I have spent in over 20 years on my +8..
On the other hand if you came across a Porsche that had EVERYTHING maintained to perfection.... then it might be worth the gamble.
Best of luck in your choices..
