It looks like the coupon to get that amp at $190 is expired now, but it still is a great deal on a very reasonable amp. I have one under my bench right now waiting for me to find a use for it, as well as one of their 5W combos in my daughter's room to be "her amp".
My current amp project involves forcing a Soldano SLO preamp (both channels, footswitchable) onto a 15W power amp and doing it all as cheaply as possible. About 90% of the components on the board can be sourced from Tayda and the others aren't hard to find or expensive. Transformers will always be expensive, but I got a set (PT+OT+choke) from Musical Power Supplies for under $200. By the time I get the cabinet and speaker the full amp will probably come out to more than double the price of the Monoprice, but it should be a much better amp and still targeting a cost of around $500, which is still a bargain for a (humbly) well-designed and well-built 1x12 combo.