Here's a list of mature age rookies (should all be under 130k) with a decent chance of playing round 1:
DEF:
Krakouer (PA) - Back in the AFL, unlikely to play at Port, but they have a spot for a running defender in their lineup.
Goodes (WB) - He's back as a rookie! Unlikely he will play at his age though, and might not actually be under 150k.
Scharenberg (COL) - Won't play till second half of season, but should score well as a downgrade target.
McIntosh (RIC) - Running half-back flanker who could slot into the Tigers lineup and be the McDonough of 2015.
Ellis-Yolmen (ADE) - Could find his way into the Crows side this season after 1 sub game last year.
Fuller (WB) - Was gonna be the Goodes of 2014, maybe this season?
MID:
Vandenberg (MEL) - Mature age mid at Melbourne sounds promising, could play early ahead of the top draftees.
Lambert (RIC) - Being hyped up as the Miles of 2015.
Holman (CAR) - One sub game last season, he and Cripps may get more game time this year in a development period for the Blues.
Freeman (COL) - Looks a big chance to play round 1, should score well. Sub?
Dumont (NM) - Could end up in jail, but if he gets through the court case he could play after dominating in the VFL last season.
Boekhorst (CAR) - The blues love him, surely a big chance for round 1.
RUC:
Griffin (FRE) - Might be cheap enough to be worth getting at R3. Won't play unless Sandi is injured though.
FOR:
Karnezis (COL) - Will the spud ever show his talent?
Blease (GEE) - See above, maybe at a new club, but massive sub chance.
Saad (STK) - Probably fighting with Lonie for a spot in the forward pocket.
Mcbean (RIC) - Big goalkicker in the VFL, and Vickery and Griffiths haven't exactly looked like superstars.
Markworth (STK) - Could take time to recover from his injuries, but certainly a target at some point this season.
Kommer (ESS) - What happened to him? Maybe been replaced by Merrett?
Hogan (MEL) - Lock him in! Only question is whether he needs a few games in the VFL.
Clark (GEE) - See above.