you dont have to prepare stuff for a car boot, just sling it in the car, get a pasting table form someone and dump it all on the table when you get there - they love a rummage! make dd look really really poor (in an oliver twist kind of way) you might get more money off people
No real prep needed for car boot. Best not to price. You offer price - they accept or offer alternative - you don't like it - don't take.it. If you think you can get a better price on ebay, then save it. As long as you make your entrance fee you are in profit.