Chris W, redxj: Hardware and chainrings will be available after the cranks are sold. I'm not entirely sure of that timeline. If all goes well with the production and delivery of the cranksets we should see the chainrings and parts out by the end of the year.

Ejuste: We sold out of the 175mm length Sugino PX crank arms at $175 in short time- those were the last 50.4 PX's in the world. TA is no longer interested in making 50.4 cranksets, and the arms alone were selling for $225 (from VO- for sure we were the cheapest out there). Chainrings and connecting hardware were additional. Modern Shimano (integrated, compact 110) cranksets are $225+ (for 105 via pricepoint). Sugino Alpina compact 110s are $150-160 (VO and Bens), and that's based on an exchange rate from 6-8 months ago. The new Soma Defiant fixie cranks are $160, with a useless for our market 144 bolt pattern (but it is 'retro').
I think the price for a complete crankset is well justified. We are not trying to be the low price leader for the entire crankset category, and in the larger category, it's a bargain. What does a dura Ace or Super Record crank go for (granted, it's not compact, or retro looking or even aluminum, to borrow your caveats)?
You can buy a low end compact crank for $50 off ebay. Occasionally a 50.4 crank arm set in passable condition (and maybe the size you need) will turn up for under $75, depending on your haggling skills or how well you know your newfound 'friend'. But those are not legit markets to bring up. It's not something we can realistically use to analyze pricing data, competition or opportunity, then pay for tooling and development costs, then produce, market and sell.

Mudboy: I totally understand what you are saying. I'm lobbying Chris to have 172.5 as an option for our cranks. Trouble is, we added 172.5 Sugino cranks since September, and sales have been anemic so far. Still, I think that size has more potential to sell than 165 or 170 lengths.