Posted: 13/09/2014 at 17:51
Depends quite what you mean by exotic/rare ? If you can identify them and then look for societies/clubs for that species, you may well find that you can rehome most of your plants to knowledgeable growers. Unless there are some real gems, you may find that people are not willing to pay overmuch, particularly if they have to do the work themselves.
Offer them to neighbours perhaps ? If you need to raise the cash then a plant sale as Forester suggests or a local market/car boot ( tho with the latter 2, you would need to do the digging and potting up yourself)
Just remember that in 10 years time when your children are too old to play in their own garden, you may want to buy all those plants back . Good luck anyway