another thing i think i should add after reading your reply and noted that you want to do holographic films...etc, most of these films are metalized polyester (such as Arlons metalized polyester 07 silver...the ones that look like crome, not glitter for lack of a better description in trying to put colors into words)these materials do not conform the same as cast and calendered vinyls and i forsee a problem getting them to adhere to the complex shapes of a cell phone especially around the rounded corners where the top meets the side as it will wrinkle and the material just does not have the "give" and stretch that "normal" vinyls do....so this is definitely something that i would recommend that you experiment with b4 selling the product to your customers....
i have printed vinyl with metallic gerber edge ribbons to overcome this problem and it has worked great (especially for outdoor applications as metallized polyester materials are not recommended for outdoor use or at least not for any length of time, i know this isnt a issue for you but added it for anyone who may be reading this thread that may need a alternative to metalized polyester for outdoor application.)
i have seen the older gerber edges for sale at very affordable prices, just make sure that if you find one you find out how much time is on the head and call gerber with the serial number and find out the history and maintenance on the machine, in addition you would also need to add a gsp15" plotter to this setup so that you could cut out the shapes after printing, unless you were to make a die for each model cellphone and then punch out the print but this would make it so that you could not use the printer for any other potential signage application and with the multitude of cellphone brands and designs would require quite a library of dies and the time to make them would probably justify buying the plotter
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i personally have no experience with the ALPS printers but i know that many people print onto vinyl with them as this may be another affordable route for you to experiment with printing on vinyl, i have heard that there will be no support on the ALPS printers at a upcoming date but i do not know if there is any merit to that statement, you can find them on ebay.
Now myself i would watch the sign forums, the yahoo sign forums, ebay, etc...as the sign market is flooded with digital printers and print and cut machines at the moment and keep my eyes open for a used opportunity at a good price, hopefully one that was not in a production shop but a hobbyist who had big dreams and learned the realities of our industry and has to unload it.
Additionally, the technology is advancing so quickly that new and "improved" machines are becoming available seemingly everyday this again is going to provide a market of used machines as people replace the machines that they have. This explosion in the digital market is also quickly making the machines less expensive, so if you are in a position where you can practice a little patience i would bet you could find a machine that would fit into your budget and produce the product you are after. Just be ready for the learning curve, it is time consuming and costly, do not think that you are going to buy the machine place it into your kiosk and be producing product immediately...especially with a staff with limited to no graphics background.