I can understand why a seller would say 'Make me an offer', but it'd definitely make me really nervous, I'd be terrified of accidentally offering too low and offending them, or worse, making them think again about letting me buy the animal. The price of an animal is not something I'd want to haggle over (of course, for breeders with larger herds it can make sense to, that's different), so I'm quite happy having a set price. I figure that keeping the animal will likely cost more in the long run than the initial price, and chins are long-lived animals (could easily outlive a dog yet may well cost less) so the initial price is not something I'm too worried about, I'd rather the seller ask what they thought the animal was worth, even if it was on the higher side.
It's something I've wondered about, as I'd like a breeding female one day, and I'm really not sure what kind of figure I'd be looking at (not that this is my main consideration at this point, need to learn more first). I've seen a young, good quality Deutsch violet girl go for about £100 (which I thought was very reasonable as she was a nice chin from good lines, don't know if it may be harder to get breeders interested in buying a relatively less common colour like the Deutsch Violet, since maybe they might want to concentrate on the colours they already breed), iirc, so I imagine a nice quality proven female might be worth considerably more (breeders always tell me that a good female is 'like goldust', but not whether that means they're literally worth their weight in gold!
), but if I was ever told 'Make me an offer' I wouldn't really know, I'm sure it can vary quite a bit of course.