The date of the cds is probably 23 FEB 1907. Proud recorded the dates to be from 6 MAY 1903 to 2 NOV 1907. Examples of cds dated 30 OCT 1912 on 20c and and 25c stamps and 30 OCT 1916, are all possibly CTOs. The picture above shows the Labuk & Sugut postmarks, taken from Sarawak Specialist Society site (ref. Robert S. Cragg). The cds are more obvious and clear, showing similar dates of 30 OCT 1912.

From the same seller, there's also a Brooketon cds on North Borneo and Sarawak stamps, which sells for $162.49.

For the month of May, I haven't been able to religiously follow the ebay. Nevertheless, I think some of the most expensive stuffs of the months have been well noted.   The cumulative value of the top 5 items this month is $ 1602.40. I personally think that the one on rank 3 deserves special mention although, unfortunately, the picture has been deleted quite early. I have been eyeing on the cover but without no luck :(

The selection criteria for this list include (a) stamps/philatelic items of North Borneo appearing in ebay, (b) must be available internationally and (c) must be on auction format only.

This is May 2010 list, check out the previous months:
January 2010
February 2010
March 2010
April 2010

There seems to be a recent upsurge in interests in North Borneo postmarks, especially the rare, less commonly seen ones. The three pictures below are quite testimonial to this. All were listed in ebay from a Dutch seller, and actually ended today, 25 April 2010. Lot [1] reached a whooping winning bid of $765.51, while lot [2] and [3] managed to get more than $200 in hammer prices. All won by a single bidder, although with stiff competitions and attracted more than 10 enthusiastic bidders. 

In lot [1], let's have a look at the most obvious postmarks i.e. the ones on the $5, $10 and $2 stamps. The purple $5 stamp is the 1889 version, tied with Kudat circular date stamp (cds) right at the centre, dated 29 MR 1892. This is the second earliest postmark from Kudat. From 1886 - 1894, it is usually strucked in black ink and later from 1894 - 1895 in blue, before black ink being used again from 1895 - 1900. The the green $2 stamps bear essentially the same postmark, dated 17 SP 1892. The postmark in $10 shows the year in 2 digits compared to the $5 and $2.

The first and second rows consist of semipostal stamps overprinted with the carmine Maltese cross and black inscription of "Red cross two cents", produced in 1916 and 1918 respectively. A proportion of these stamps was sold by the National Philatelic War Fund in aid of the Society of British Red Cross and the Order of St. John of Jerusalem. This was to fund the wounded or for the soldier's widow and orphans, following the World War I, where Great Britain declared war on Germany in August 4, 1914. The stamps sold by the National Philatelic War Fund are usually mint, whereas the ones retained by the North Borneo company are either in mint condition or used postally. The postally used stamps with this overprint are particularly rare especially from towns other than Sandakan (the capital city from 1883 - 1946). In the picture above, at least 2 stamps bear a clear Kudat postmark on the overprinted stamps, while the rest show vague cds from the same town.

Interestingly, the lot also includes some of the earliest North Borneo stamps, largely bearing the Kudat postmark as well. This is to be expected because Kudat was the capital city of North Borneo from 1881 - 1883, before being moved to Sandakan.