Yeah Shposhae is a great lowbie dungeon and you can get some good gear--not just the rare Plundered gear but while you're farming the chests you'll also get a bunch of level 15-20 normal gear and weapons like cesti, boots, gloves, etc. Plus it's really fun. ^^

Also with regards to low level stuff being expensive, there are NPCs in the market wards now that have lower-priced lowbie gear, you may want to check them out if you can't get some people together for Shposhae anytime soon.