Club Seats are generally for those who can afford it (that may be a "Duh" but a lot of people aren't familiar with premium seating).
A pait of of tickets for the Clubs start at $4000-plus for the season (all 10 games) so a single seat is $2000-plus.
If you're able to afford that and will enjoy the special treatment they give you in the premium seating areas, more power to you.
For us general rabble, it's cheaper to purchase tickets from scalpers than pay face value for Club seats. That reason alone makes it difficult to sell extra Club seat tickets if you are unable to use the tickets. If you will not be able to use all the tickets then you may wish to contemplate how much you want them because you're more than likely going to eat the cost of the tickets. If you're a business person who will give them to clients, that's different.