Unless Easy Squeezy are offering really good pre-booking deals - shop when you get there. They are fighting for business as expected!
Prices c2006 for trip to Gib - Euro 10 for 'Shopping Trip' only - i.e lift both ways.
Approx Eu 35 including Dolphin Watching or 'Rock Tour' or Cable Car.
Be aware if you intend buying Tax/Duty free that there are limits (i.e 200 ciggies, 1 ltr spirits etc. Personally I still think it is best to buy as much as you want in Tax paid stuff in Spain).
DON'T FORGET YOUR PASSPORT ;)
Morrocco - can be anything from Eu80 - 120 depending on type of trip. Day trip is a bit of a long haul as you have to get up early, get the coach to Gib (usually), they put you on the high speed ferry.. you spend a lot of time in the coach the other end.. etc, etc. IMO Morocco is a 3 day trip min. (Plus you must be prepared for 'Developing Country' environ).
Buen Viaje!
ps - website below may have some coach co's who are offering these trips so you can have a look at the current prices..
www.surinenglish.com