Never pay down a deposit in a bank account until you have met the seller, seen signed a purchase agreement.
No serious private advertisers ask for a down payment before you meet.
Receiving an email with an in-scanned ID does not mean that you have identified the sender. You do this on the spot, when you sign a purchase agreement.
Canvas, size 60 by 90 cm — 900 dinars. Didn't need it, didn't even remove the film. Brush stand — 50 din. It was collapsible, but I glued the elements with epoxy for stability. Bargaining is appropriate, my Telegram is @iv_annushka