It all rather depends on
what you collect, and
how you collect it. For example, this

is the complete country of Jhalawar, on a simplified basis. If you want to get technical, the specialists recognise a blue-green shade of the first stamp:

Two or three stamps, catalogue values (Gibbons 2013 Part 1) £6.50 simplified, or £176.50 specialised.
Of course, you
can then go on from there, to sheets, covers, postmarks and so on.