I had a 3" M13 many moons ago. Still kicking myself for selling it.
I have to settle now for a 3" M64, a 2.75" Speed-Six, and a 3" K6S to appease my 3" lust. (Oh, and a 3" SP101 in .327 that I have been working up loads for.)
I would dearly love a 3" M65, but the ones I find are priced beyond my cheapskate ability.