Another thing to consider is that HE60's may be hard to get repaired at this point, if something goes wrong with them (especially with their elements), considering how long they've been out of production at this point (says the man with K1000).
Oh, I don't know what's fair market value for NOS HE60/HEV70 now-a-days, but the I've seen of late have been in low to mid $2K range. To think I used to see them for half that.
Oh, and thanks for reminding me how much I miss my stats rig. :'(