The VFO in the pic is one we rehabbed and sold on Ebay. Been doing it for years. The left knob selects two bands, covering from around 15 channels below 1 up to channel 60. The drive level feeding the radio is boosted well above the factory output level. Prevents loss of power when changing from a crystal channel to the VFO. And the drive level doesn't drop off when you select the upper band, the way the factory setup does. We babysit them for a week or longer as needed to 'tweak' the frequency drift down to about 1 kHz from cold to warmed up. This is why we won't offer to "rebuild" a customer's unit. Never can predict how many tweaks, or weeks needed to minimize the frequency drift after it's converted.
I have some in stock now. Price is 200 bucks plus KY sales tax plus shipping/insurance.
We will accept a trade-in stock Siltronix (only) VFO if it's in rebuildable shape and hasn't been trashed on the inside. We take fifty bucks off the $200 sale price for this. A trade-in unit doesn't have to be a "3". Any type number is okay, model 80 or 90. They are all two-band VFOs when we finish them.
The display comes in four colors, blue/green/yellow and red. Naturally, they're not always all four in stock. Never hurts to indicate a first and second choice of color.
We rebuild these in batches of 5 to 10 at a time, so when this batch sells out there may be a delay before the next batch is ready to sell. Never can tell how long to collect another batch of rebuildable VFOs.
There should be a link to my email on my profile page. Just click on the "2600" username just above the avatar.