They weigh about 12 lbs (without the case). The 222 is a ***highly*** desirable and rare model of the featherweight. Not many were made. The 221 has a hinged table that folds up for storage; the 222 has a removable table that turns the featherweight into a freearm. The serial number provides a way to date the machine; usually does not affect value.
Prices tend to be lower on the East Coast because the population was so much more dense there during the period when featherweights were being sold new. I'm not sure what it's like in CA. In the upper midwest where I am, a good deal on a featherweight would be about $300 for one in good cosmetic condition with case and accessories.
People can ask whatever they want for a featherweight; it doesn't mean they get that price!