We have a customer who has a 4880 configured with Sawgrass Sublijet IQ inks - they are closing down the line of product that they have been producing with this printer and are selling it. If you talk to Sawgrass, the 48/4880 series of printers is great for Sublimation - they don't clog as frequently as other Epsons and are generally very reliable. The 4880 that is for sale has a relatively new head and capping station and is in very good condition.
And, you can use the Sawgrass driver when printing, which Sawgrass says is color accurate, but a lot depends on paper, the transfer substrate, and the temperature and pressure at which the sublimation process is done. We've configured the Wasatch RIP a few times for use with sublimation, and I can't imagine getting good and predictable results without it (nor without profiling software and a Spectrophotometer).
If you are interested, we have a link on our website to it -
here - you can email the owners from this link.
Tony