The cost of an all on 4 dental implant with value for money package includes:

• the 4 dental implants
• their 4 prosthetic abutments to maintain the 12 above dental crowns 
• the 12 temporary crowns above the 4 implants
• the 12 permanent crowns in zirconium that will replace the 12 temporary crowns

I might need to add to the price the options:

• the dentist fees and an x-ray
• the teeth and root canal extractions

The price variations to this price are:

• the type and brand of the implant: each dentist offers his favourite dental implant brand, just ask if you need another one
• the technique used and any additional procedures: if you would need to add a dental bone graft or choose an all on 6 dental implant  
• the material chosen for the crown: zirconium dental crowns and in your case the first type would help to have a cheaper all on 4
• if you prefer an "immediate loading" protocol meaning all shall be donw in 1 trip instead of 2: in this case the cost and time taken would be very different

The "All on 4" implant Value Package means the best offer anyone can get with an "all on 4" dental implant system. Best value for an all on four means the dental clinics provides the best quality and has the best rating while the all on four offer has fair prices. If the dental clinics is not accredited then the dental clinic is rated as the best based on the dental universities of the country and the prosthesist experience. Many factors are included in the rating of your all on four such as the number of years of experience of the specialists, if the dental clinic has its own laboratory, is the clinic part of an all on four knowledge program, if nearby Universities than train dentists are well rated, patient reviews and rating etc.