bicycle AND moped registration in md was repealed in I believe 1982, or thereabouts. prior to that, even bikes had reg stickers.
cost to get your ped legal between 10/12-10/13 = $5 + cost of insurance (still yet to be determined).
getting registered after 10/13 = $25 plus insurance.
when registering a previously-registered bike you PURCHASED after 10/1/12, presumably add $19.20.
you can't start any registration until after october 1, 2012.