I would say the average amount to purchase a maltese dog without papers would be in the 300-500 dollar range, depending on the size and weight of the dog.
The average price to pay for a maltese with no papers is $500. You are not getting a guaranteed purebred or a dog that will necesarily meet AKC standards. $500 PERIOD.
Well, this depends whether it is male or female and whether or not it is spayed or neutered. And dependant upon ago. All these factors change price. Female not spayed should bring 200 dollars. Male not neutered 150
I would never pay anything for a dog with no papers it can never be registered or sold it's just a grade you couldn't breed it to a registered either it would cross the bloodlines.
If the dog has no papers then you're going to have a time trying to get people to pay much money. A dog with no papers is worth about as much as a mutt.
Maltese can be aquired from a shelter for around $50 or a rescue group for $200 to $400. Dog will be already neutered and have shots which can save you up to $500. Backyard breeders and pet stores charge up to $1,000 for possibly sick dogs.