Yeah, I think the Crown is gone, but it may pop up again. It had most of the windows removed and skinned over and I think it had the seats removed... though I have seen so many buses that I can't remember without seeing the pictures. It was $6 or $7k and had a cracked driver side window. It was our favorite, but also a fair bit over what we had hoped to pay. The mid-engine worries me a bit, as it seems like the whole layout would have to be based around leaving that bit open for future repairs. It was our favorite based on the look, though.
The Gillig has a 3208 in it, and is coming up on the 200,000 miles point where people talk about it needed to be rebuilt, if it is the original engine and has never been rebuilt... and if the odometer is original. Though, the engine is in the rear, right? Might it be one of the models that has the "trench" like floor? I am guessing based on the pictures. I will have to call and ask the seller some questions and see what they know/will tell me.
I did find this '77 Gillig on Govdeals:
Basing the price to the '68 Gillig, it coming with a generator, 2 AC's, that side door that looks to be full height w/stairs AND most of the windows have been skinned over... $5-6k might not be so bad. It may already be registered as... well something other than a bus, since it has no seats. Once again, it does have a 3208 and an unknown transmission. It sells (or doesn't) tomorrow... It is pretty tempting.
I am not hugely mechanically inclined or educated (owned and worked on my '72 bug and have done lots of basic maintenance work on other cars), but I mean... it doesn't seem far fetched to say that I could find a used cummins 5.9 or possibly an 8.3 and get it swapped into that '77 Gillig for near the same cost as getting 2 AC units, water tanks and a generator... (which all come with the '77) Though, I am not sure if any cummins 5.9 will work, or if it has to be specific to the application (front or rear mounted).