I've a Gaggia coffee maker which cost me several hundred pounds but if I'm honest, most days I use a cafetiere
Good knives are a must and worth spending extra on. You may think your £5 knife from Wilkinsons is great but when you try something like a Gustav Emil you will see a big big difference.
Pots and pans, have a good range of sizes available. Mine range from a full set of Le Creuset (still great after 35 years) to cheap stainless steel stock pots. Pressure cookers, really big for pressure canning, down to family size and a dinky little one I used in my camper van. All the above are 'vital' to me and really should be looked at as very basic tools for anyone wanting to develop their cooking skills IMHO.
I do buy gizmo's for the kitchen but most are to be found at the back of a cupboard after little use. I don't need a rice cooker as I have a saucepan, I don't need a soup maker as I have a saucepan or pressure cooker; they are two gizmo's I'd never bother buying. I do have a bread maker but generally only use it to mix and knead my bread then proof out of the machine before oven baking.
The best thing to do is make sure you use what you buy and don't be like me with a cupboard full of pasta makers, salad spinners et al lol.