Ya, not all keyboard come with keypuller. For example, Filco (normal series).  
What keyboard you get?

what switch are you using?
i'm using blue switch and they all feels the same to me. probably you need to remount your spacebar.

Make the paper clip puller and use that... don't use fingernail. You break your fingernail is ok can see doctor heal easily but break caps/stem then you GG.

don't use fingernails  unless the keycaps is already very loose and you can use ur fingernail to lever up the keycaps without any force.

one of the ways i use to remove keycaps without keycap puller or makeshift puller from paper clip is by using 2 expired driving license card.
using one corner from both cards, place them on both sides of the keycaps deep enough.
use equal force on both cards to try and lever up the keycaps.
for spacebar, remove both Alt keys first and removing your spacebar will be a breeze.

Guys,

I want to host a groupbuy for (round-necked) T-Shirt to represent M'sia mechanical keyboard community.
The MOQ is 30 pieces.
Anyone interested?
Design will by me or anyone.
Any input is welcome.

Lead time for production: 2 months.
Pricing: RM 25 each.

Note: This is an interest check.