I didn't think any site would have prices on them because they want you to go to a local dealer.
Try looking on eBay to get an idea of prices. Also, if people here are willing to say what they paid for machines, that would help you.
My Janome Jem Platinum was $499 when I got it 4 years ago. They are now going for $439. Great little machine to take to class, very lightweight and it has 60 built in stitches.
I have a Janome Memory Craft 9000 that I bought when it first came out about 12 years ago. I paid top dollar for it then because it had just come out, but that machine sells for about $1000 brand new now, if you can find them. They've had a couple of other top of the line machines come out after the 9000, so they're getting harder to find.
I'm looking at a brand new Bernina 155 selling for $750.