Blades.
Below I will list the DE Safety Razor blades available within Indonesia from BukaLapak's sellers. If the blade you want is not on the list then I suggest you try Hargaduniaas it is doubtful Lazada will have it.
I will though give links to both Hargadunia's and Lazada's pages for your perusal should you wish to look.
When searching for blades on BukaLapak you need to search for Silet Cukur to get a list but you will also get other things besides at times such as windscreen wiper blades and boots (for some reason).
If you know and want the availability of a particular blade the search that by blade name, eg Silet Derby or Silet Astra etc.
Before I start I should mention (as I forgot earlier) That I have a "no-name" safety razor that I bought eons ago along with an Edwin Jagger DE89 that I bought in February this year via Hargadunia. This is just in case I need to mention them when if necessary comparing blades. I have a couple of others and one awaiting delivery but I will come on to those in my razor post.
Before I list the blades I'll start with what I bought here:- (all prices Rp/blade number)
SuperMax Chromium Rp 31500/100 (at the moment not available)
Derby Extra Rp 55000/100
Derby Premium (new 2016) Rp 50000//100
Gillette "Wilkinson Sword Edge" Rp 116000/100
So what blades are available here on your doorstep with a small JNE fee of around Rp 9000 and at what cost ? I think you may be surprised.
All the following are available from BukaLapak vendors as I write (in no specfic order):-
Gillette Sword Rp 23000/5 ( I do not know the provenance of this blade, to the best of my knowledge "Sword Blades" are either Gillette Wilkinson's Sword or Wilkinson's Sword Classic)
Gillette Goal Rp 15000/5 (crazy or what ?)
Tiger Rp 31000/100 ( looking at the package these blades are more than likely carbon steel and therefore if so will need care to prevent rusting)
Treet Classic Rp 75000/200
Laser Super Stainless Rp 60000/100
Dorco Stainless Red Box Rp 50000/100
Stainless Red Box HQ Rp 65000/100 (made in Vietnam under licence)
Stainless Prime Rp 50000/100
Lord Rp 6000/6 = (Rp 100000/100)
SuperMax Platinum Rp 95000/200 = (Rp 47500/100)
Astra Superior Platinum Rp 105000/100
London Bridge Rp 6000/5 ( Gillette Goal's sibling, another crazy price)
Zorik Rp 80000/100
Derby Extra Rp 55000/100
Derby Premium (new as of 2016 I think) 50000/100
So not a bad selection really in Indonesia. If you must have a specific blade not listed such as Persons or Feather then you will find them amongst others such as Gillette Wilkinson's Sword and Wilkinson's Sword Classic on Hargadunia. Lazada have other blades bbut not known names mainly Chinese origin.
Hargadunia
https://hargadunia.com/search/razor blades
Lazada
http://www.lazada.co.id/catalog/?q=de safety razor blades&searchclickposition=prod4
Lazada is difficult here to search, even narrowing it down spurious results come up. More expensive than Bukaapak for same blade.
Well that just about winds up my info on DE Razor Blades. I hope it has proved useful and will save you a bit of money.