You know what's surprisingly expensive? Bathroom hardware. Most brand name faucets will set you back at least a couple hundred dollars. Luckily, there's a market of sub-Benjamin faucets that don't sacrifice aesthetics.
Of course, occasionally you get what you pay for, so do some due diligence on the brand and model you prefer and make sure the source has a reasonable return policy.
I've looked at some of the usual discounty suspects here, but the best deals seemed to be aggregated on Amazon.
1 Single Handle Chrome Centerset Sink Faucet LD-2114, $59.99 from Light in the Box
2 Hans Kristof Single Handle Polished Chrome Finish Bathroom Faucet 08S, $64.95 from Modern Danish
3 Vigo VG05001CH Wall Mount Bathroom Faucet, $82.20 from faucet.com
4 Aquadis M06-2160CH Centerset Washerless Widespread Bathroom Faucet, $54.00 from Fixture Universe
5 Kingston Brass KS1161PX Heritage Widespread Lavatory Faucet with Porcelain Cross Handle, $73.30 (list price $265.95!) from Amazon
6 Danze D303057 Opulence Two Handle Mini Widespread Lavatory Faucet, $85.83 (list price $288!) from Amazon
7 Heritage 4" Center Set Lavatory Faucet, $96.99 from Target
8 Fontaine Amor Chrome Widespread Bathroom Faucet, $92.99 from Overstock
9 Price Pfister Satin Nickel Bathroom Faucet F049SYKK, $59.99 from thefaucetdiscounters on eBay
10 Bayview Collection Premier 120168LF Lead Free Two Handle Lavatory Faucet, $21.12 from Build.com
Images: as linked above