Taken from the British magazine "Classic and Sport Car", January 2004.

914-4
Resto: 1000
Average: 2750
Show: 6250

914-6
Resto: 2000
Average: 5000
Show: 10000

All prices in pounds sterling.

For comparison:
Show condition 356/356A (51-59): 18,000
Show condition 911S 2.0: 17,000
Show condition RS 2.7 Carerra lightweight: 42,500
Show condition 911SC 3.0: 14,000

Taken from the British magazine "Motor", August 1970:

How times have changed!

Dang! My question is what can you buy an time capsule for thirty years today and get that kind of return?

Classic and sports car are a bit unrealistic in my view. K Sueme has just sold his 914-6 to a gent living in Germany, I think it was advertised in the region of £12-£13K
-J