The other option I had was getting the bus, but I'm travelling solo this time so wanted to try and avoid public transport if poss. It scares me enough in this country lol....
Fear hardly ever is a good base for decision making. In this case it can easily result in you limiting yourself without any reason. Lynx -amongst others- is a very safe transportation mode for any and all, including females, kids, solo travellers, you name it. Most of my trips are solo trips. Combine that with female and overly visable physically being no "resistance" at all for anyone with not so proper ideas. Also have used Lynx extensively. Sure, it isn't the smartest move in the world to put yourself in a dark unlight deserted location, but common sense and all. Still leaves loads of day and areas left that one can very safely, easily and very cheaply visit and explore. Obviously lynxing isn't always the best fitting option for everyone or in every situation and that's perfectly fine. It's just a shame to limit your options based on fear instead of your itinerary, what you'ld like to do etc.
As far as the M&M's? Easier and cheaper; order online to have it delivered to hotel room/villa or go elsewhere and combine it with other types of shopping. Goodings is simply way over priced. Not talking about a dollar per bag more, but easily have seen prices of 200, 300% or more. And very bad selection, but that is to be expected from such a small store compared to your general superwalmart or supertarget.
Best assortment can be found at Target.
Walmart sells less varieties. Depending on when you go, be on the look out for the weekly sales. Week 39 or 40 always seems to have M&Ms on sale at Targets, 3 large bags for $8,-. (travel same time of year on most trips and always stock up on certain varieties for myself and others for friends and family that aren't sold here, got it down to a science by now). The weekly flyer is on the website, so very easy to check out before going anywhere.
If you do consider walmart route; currently they have coupons for $1,- of a bag of M&M harvest (basically normal ones but in fall themed bags) that are good for the next couple of weeks. Very easy to print from the website and if going to walmart anyway, easy way to safe on that total you'll end up being charged anyway.