Are you talking about the overview photo not being of the same machine as the detail photo? 

I don't think it's a Brother, at least not one that I'm familiar with. That three screw layout is similar to what you'd find in some '60s Royal models like the Parade, but it's not exactly the same. If I had to guess I'd say it was perhaps a Silver-Seiko/Silver-Reed produced typewriter. I have a Royal Fleetwood that looks very similar to the one in the photo.

I would tend to think it was an honest mistake - if the seller has (or had) multiple typewriters on offer. For a layperson selling typewriters the detail shots probably look the same. If it was a mistake you would think the auction would be edited to correct that mistake. Did you get a reply from the seller?

I also ask type examples - even with specific ones "to check alignment issues" :D
Also unusual perspectives like from underneath or the gears of the spool assembly help to see if someone likes to scam you.
 

I've done a lot of buying and selling on eBay (for more than 25 years). Even if an listing says "no returns," if the item is described as functioning and it doesn't work right, if you open a case with eBay they will send you a return label and tell the seller to refund the entire amount of the original purchase including shipping. If the seller doesn't issue the refund, eBay will, and then take it out of the seller's account. If the item is sold "as-is" or "for parts," one the other hand, then you're out of luck. And if the seller claims you damaged the item and then returned it, it becomes a he said, she said situation, and could get sticky. I've never had that happen, but I imagine it can. I rarely buy from a seller with less than 100% positive feedback, unless when I look at their feedback there's only one or two negative scores, and from the description you tell that the person leaving the feedback is a maroon. For example: "Post office lost the package, but seller refunded me anyway. Still, it was a big waste of time." (Yes, really, I've seen people leave negative feedback like that!)