It's highly unlikely you'll find a purebred Abyssinian kitten for $280. If you do, it's very likely to be either a sick kitten or a crossbreed. It's strongly advised not to be tempted by such low prices, as you could easily be scammed.

Trying to buy an Abyssinian cat for $280 is unreliable. This price is significantly below the market value. Any Abyssinian cat priced this low will almost certainly be what is commonly referred to as a 'sick cat' or a mixed breed. It is crucial to avoid these unbelievably low offers to protect yourself from being defrauded.
Abyssinian cats are a relatively rare breed, and a purebred Abyssinian kitten generally costs around $840 or more. This price is considered very high for a pedigree cat; indeed, you can buy very high-quality cats of other breeds for $840. However, that sum is just the starting point for a purebred Abyssinian cat. Non-purebred Abyssinian cats are cheaper, and you might find one for around $140-$280.
However, if an Abyssinian cat is offered at too cheap a price, it's wise to avoid it. Many kittens sold in pet markets for around $140 are unreliable. They could very well be kittens that won't survive for long, which will obviously cause great distress. If you are looking to purchase an Abyssinian cat, it's best to choose one with pedigree papers. Though they are more expensive, the quality is guaranteed.