There's a local bottle shop that fills all 64oz growlers for $10. The beers they have available aren't always A-list, and sometimes they remain on tap for a few weeks, but if you know what you're doing it's a good deal. I've bought Victory Dirtwolf, Alpine Hoppy Birthday and just the other day picked up Ommegang Glimmerglass.
Nobody can compete with tribal growler fills. In New Mexico you can get a 64 ounce of La Cumbre Elevated and any other number of local beers for $5 a fill. No telling how old the kegs are. No telling anything really. It's kinda wild west, no pun intended.
Pliny. If you already have a RRBC growler, $16. Not many tried & true world class beers compete at this price point.