I need some sort of travel cage. I used to use a 'keet cage, but the friend to whom I lent it never returned it

Oh, and I think I'd have to disassemble Mercury to get him through the door lol
Anyway, any recs? The cheapest thing at my local pet shop with bars close enough to each other was a $20 dog carrier

I'm not sure it's OK for him, though. I rather like the Parrotopia(sp?) ones. Are they good?
Also, I noticed during my online wanderings, these strange clear acrylic ones that cost hundreds of dollars. Is there any advantage to them, really? I tend not to skimp on things for my birds, so if they're hugely better I'll go in that direction, but if they're just a gimick, I'll invest in some other sort.
Question is... what sort should that be?