Poor product definition or pricing structure.
An Ill-defined product may not be accepted if it does not provide expected or new and acceptable user benefits. An Ill-priced product may not be purchased if it is over-priced and, if under-priced, it may be perceived as inferior or 'cheap'.
What to do about it!
The market, users and competition should be analyzed well enough to determine acceptable product parameters such as:
A completely validated product (works as advertised).
A verified value chain: Features User needs User benefits;
(A user buys benefits; benefits originate from needs and needs drive product features).
A Unique, but not 'way out' product.
Good User manuals.
Intriguing product style (industrial design).
Considered Cost-of-Manufacturing, Cost-of-Sales, support and user pricing.
Just remember that users look at a product and say, "What's in it for me?"
Strong Competition or No Benchmarking.
Unknown or under-appreciated competition can leave you in the dust.
What to do about it!
Seek out the competition and compare and contrast your product with theirs.
Provide a product that is:
Less expensive with reduced, but most important performance and features.
Better performance and features at same price.
Fulfills more user needs at not too much greater price.