If it's paper tickets you need a few days for delivery. If it's digital download you can buy the morning of.
My dad passed away right before the season and had Twins season tickets. I have been selling most of the tickets on Stubhub and I just enter the serial numbers and Stubhub recognizes the tickets and issues downloadable tickets to any buyers. This was a new feature to me and it works great. I have bought these types of tickets in the past but the sellers were often institutional sellers like USC, who was dumping tickets on the ticket services before the 2011 Gopher Game.
Over the years I have attended at least one high profile Gopher game with my dad, who also had Gopher tickets. For that game I would always sell my two tickets and try to get 250 to 400 for the pair, and Michigan, OSU, or Nebraska fans (or sometimes Gopher fans based upon the people I saw sitting down in my seats) would usually pay top dollar, and I'd pay for chunk of my season with one game. For those sales I always had to download a UPS or FEDEX shipping label Stubhub e mailed to me and ship my tickets as soon as possible. I could often sell the tickets up to early Thursday and then ship the tickets UPS RED or FedexP1 for Friday delivery.
Stubhub also had some local "ticket depot" options where you could deliver your tickets to a specific place that would take care of the in town transfer. I think there was a fee for this and I never tried to use it. The shipping labels were pre-paid by Stubhub.
I am not sure if Stubhub has upgraded and this e ticket option I utilize to sell the Twins tickets is now available for Gopher tickets, but it is great. I suspect the MLB and Stubhub have a close relationship, which is why this is an option.
This year I'll either be scouring the street, buying at Stubhub or Vivid, or better yet grabbing some of the bargain basement tickets the U always floats out there at some point (see Living Social TCU). I will miss my old seats for sure, though. I checked after the Coyle e mail, and they are gone!