you should have a look at the plants section of the classified ads on here too, it's worth putting up a wanted ad if it's something particular you're after.
Nothing in particular. I'm about to add my 2 month old swordtails into the main tank and as the plants have thinned out a lot, I thought I'd add some plants to give the newbies some extra cover.
If you just want a big bunch 25+ and at a price you can throw the unwanted ones away at check out Lasttradingpost on ebay.
Used it many times and you can put in a request for a specific selection, for example I asked for a tonne of bulbs and ferns. You can also be cheeky and ask for Rhizomes and you will frequently get Java fern and if you're lucky the odd Anubis. For the more specific plants I tend to go straight to Thegreenmachine online which is quite pricely averaging £5-10 per plant.