Although EN1A is about 50% more machinable than ordinary mild-steel (EN3A), EN1A-Pb is roughly 150% better. Prefer EN1A-Pb (aka EN1A-leaded) unless welding is on the agenda!
You've probably got a local metal distributor nearby, but if he's like mine, he'll be low-key, preferring to deal with trade rather than the ordinary public. Try a local Trade Directory under Steel or Metals and watch for names on delivery lorries and signs on Business estates! Buying local can save on delivery costs, but bear in mind cutting is extra and it may pay to buy in 3 metre lengths.
Although my local emporium sells off-cuts, they were distinctly unfriendly at first. Waiting one day I noticed the shop was full of chaps seeking free-advice, who didn't know what they wanted, and then walked out when told the price! (Metal isn't cheap.) I suspect this is why Metal Dealers don't advertise! I'm much more welcome now I arrive with a straightforward and profitable list. Major love is reserved for customers who do Invoices and Purchase Orders and order metal by the ton.
I also buy stuff from the internet (Metals Supermarket & m-machine, plus Noggins End and the other hobby sources who advertise here), but not ebay unless I'm happy to take a risk. ebay is a bit of a gamble. Could be a bargain or a disaster depending on how knowledgeable the seller is.
Consider buying a MEW subscription with access to the archive. Good article on steel recently from Stub Mandrel, it's the sort of information that makes the hobby easier all round.
Dave