Propagating seedlings

You can sell your seedlings at car boots or give them to local shops to sell,maybe on a sale or return basis,you can often get plant pots and trays for nearly nothing
(used)from nurseries ect,when buying seeds consider how many seeds are in a pack for your money,for egs some packs only have half a dozen seeds others have thousands.You can start your seedling business very cheaply,and you will know this if you like gardening,you always have seedlings left over.you could easily make your self a very good extra income doing this