I guess it really depends what type of cooking and food prep you do.
For me, I could not be without a big (25cm plus) chef's knife, and a smaller vegetable knife (about 15cm). These are non-negotiable. A cerrated 10cm-ish veg knife is useful for cutting tomatoes (tomato skins on varieties sold in the UK blunt straight blades unbelievably quickly), and a cerrated bread knife are the other things I use regularly enough that I'd prefer not to be without.
A 3-4cm paring knife is helpful but although I use one two or three times a week I could probably manage without. Small sub-10cm vegetable knives I personally never use, but my wife cuts cheese and fruit with them.
I managed without boning and filleting knifes, and poultry scissors, for the first 20 years of my adulthood. I have them now and use them, but rarely. Two meat cleavers, same story. The Santoku knife gets used a couple of times a month, but I wouldn't miss that either.
Carving knife and fork get used for roasts probably two weeks in every three, but when I was single I could easily go one year's end to the next without using.
As for "good value" - that really comes down to preference and how you prefer to work in the kitchen. I have a Global block set which set me back an eye-watering sum 15 years ago, but it transformed things in the kitchen and has been worth every penny. You'll have to prise them out of my cold dead hands to get me to give them up. I use a sharpening stone to keep them in shape.
It's supplemented with a pair of 30 year old Kitchen Devils dating back to my school days, a wood-handled bread knife I bought overseas as an undergrad, and a collection of Sabatier knives and the carving set which all came from Aldi about seven or eight years ago. If I recall correctly they were about £20 for a set of three and therefore something of a bargain, but obviously not a regular product line.