Buy a barn find

1918 Harley, with 1917 sidecar. Orig paint, found after 50 year slumber in a shed $5500
1926 Essex tourer, 42000 miles, 8500 GB pounds
1931 V12 Cadillac Fleetwood town car, unrestorable donor parts car
1941 Lincoln Continental Coupe, V12. Rough. $8000

These and 45 more: http://www.prewarcar.co.uk/the_barn.asp