Each parcel contains a innocuous item and a smuggled one. For instance, the seventh one, 110 kg : IDQUAIAALZÁDUBAESL, has QUAALUDES smuggled within IDIAZÁBAL, a Spanish cheese. Each innocuous item comes from a protected area in the EU. For instance, Idiazábal cheese has a Protected Designation of Origin and can only be made in a certain place. Getxo is one of those places, so you match up the two (and hopefully the very specific location can help you determine the innocuous item).
Broken down, the items are:
BDIEAUMORRNEDDARRIDNEGNNSE: DIAMOND RINGS / BEURRE D'ARDENNE
BEAMUPRHERTEARMOISNESE: AMPHETAMINES / BEURRE ROSE
CLEARANDPAAILNTENTEDEJTOAYNSA: LEAD-PAINTED TOYS / CARNALENTEJANA
DEENHDEANSADGEEREXETDSPREEMCAIDESURA: ENDANGERED SPECIES / DEHESA DE EXTREMADURA
FBOOTOINLEDGECGRAINU: BOOTLEG GIN / FOIN DE CRAU
FSURBOMMACHAINGEEDGEHUENRVSE: SUBMACHINE GUNS / FROMAGE DE HERVE
GRAJAGUNAPARADPELANTSO: JAGUAR PELTS / GRANA PADANO
IDQUAIAALZÁDUBAESL: QUAALUDES / IDIAZÁBAL
IMPIORKAITELDLSOYFRTEWAGRATEO: PIRATED SOFTWARE / IMOKILLY REGATO
KANARTJIAONLAALNPSEIICRRAEKTKSA: NATIONAL SECRETS / KARJALANPIIRAKKA
KORÖDLNASNCCEH: ORDNANCE / KÖLSCH
MURSHICANOTCEDROUSHOVENRTONUSX: RHINOCEROS HORNS / MUSCAT DU VENTOUX
OMPELPEARMIDONEZEPEETRFROONODDE: MELAMINE PET FOOD / OPPERDOEZER RONDE
PRCOEUKNTMEURRSFEKAIGTIMBOANNIECYA: COUNTERFEIT MONEY / PREKMURSKA GIBANICA
SINKDECLANDENTRMAUOVISESIS: INDECENT MOVIES / SKLANDRAUSIS
STGOULPAVDDSOKUBÉLOZONELSÉ: GOLD DOUBLOONS / STUPAVSKÉ ZELÉ
WFACORHAGUEDERAMARIRTLWLORKE: FORGED ARTWORK / WACHAUER MARILLE
ŽKENMOACITIKOŠKAFFSMEKRACHASNTDIINSYES: KNOCK-OFF MERCHANDISE / ŽEMAITIŠKAS KASTINYS
ΠAHAΦÍRVTEISKTEODΛOOYRKÁNGIANKSO: HARVESTED ORGANS / ΠAΦÍTIKO ΛOYKÁNIKO
The innocent items start with A to S, providing an ordering. The flavortext heavily implies looking at the per-unit tariff, so in order that's:
AMPHETAMINES / BEURRE ROSE / LUXEMBOURG / € 0.39662964
BOOTLEG GIN / FOIN DE CRAU / FRANCE / € 2.28673526
COUNTERFEIT MONEY / PREKMURSKA GIBANICA / SLOVENIA / € 0.01251878
DIAMOND RINGS / BEURRE D'ARDENNE / BELGIUM / € 0.27268288
ENDANGERED SPECIES / DEHESA DE EXTREMADURA / SPAIN / € 0.03005061
FORGED ARTWORK / WACHAUER MARILLE / AUSTRIA / € 1.45345668
GOLD DOUBLOONS / STUPAVSKÉ ZELÉ / SLOVAKIA / € 0.13277568
HARVESTED ORGANS / ΠAΦÍTIKO ΛOYKÁNIKO / CYPRUS / € 25.6290216
INDECENT MOVIES / SKLANDRAUSIS / LATVIA / € 29.8803080233
JAGUAR PELTS / GRANA PADANO / ITALY / € 0.0036152
KNOCK-OFF MERCHANDISE / ŽEMAITIŠKAS KASTINYS / LITHUANIA / € 2.31696015
LEAD-PAINTED TOYS / CARNALENTEJANA / PORTUGAL / € 0.02992787
MELAMINE PET FOOD / OPPERDOEZER RONDE / NETHERLANDS / € 6.80670324
NATIONAL SECRETS / KARJALANPIIRAKKA / FINLAND / € 3.53194646
ORDNANCE / KÖLSCH / GERMANY / € 9.20325386
PIRATED SOFTWARE / IMOKILLY REGATO / IRELAND / € 7.61842847
QUAALUDES / ANTEQUERA / SPAIN / € 0.05409109
RHINOCEROS HORNS / MUSCAT DU VENTOUX / FRANCE / € 3.35387838
SUBMACHINE GUNS / FROMAGE DE HERVE / BELGIUM / € 0.12394676
That's not great. But there's one last thing to notice: all these countries are not only in the EU, but have adopted the Euro. Thinking about the reference to "early 1999" in the flavortext may inspire you to try converting these to their pre-Euro exchange rates. Doing so, you get:
AMPHETAMINES / VIANDE DE PORC / Lux. F. 16
BOOTLEG GIN / FOIN DE CRAU / Fr 15
COUNTERFEIT MONEY / PREKMURSKA GIBANICA / 3 tolars
DIAMOND RINGS / BEURRE D'ARDENNE / 11 fr
ENDANGERED SPECIES / DEHESA DE EXTREMADURA / 5 Ptas
FORGED ARTWORK / WACHAUER MARILLE / öS 20
GOLD DOUBLOONS / STUPAVSKÉ ZELÉ / 4 Sk
HARVESTED ORGANS / ΠAΦÍTIKO ΛOYKÁNIKO / Cyp. £15
INDECENT MOVIES / SKLANDRAUSIS / Ls 21
JAGUAR PELTS / GRANA PADANO / ₤ 7
KNOCK-OFF MERCHANDISE / ŽEMAITIŠKAS KASTINYS / 8 Lt
LEAD-PAINTED TOYS / CARNALENTEJANA / 6$
MELAMINE PET FOOD / OPPERDOEZER RONDE / ƒ 15
NATIONAL SECRETS / KARJALANPIIRAKKA / mk 18
ORDNANCE / KÖLSCH / DM 18
PIRATED SOFTWARE / IMOKILLY REGATO / IR£ 6
QUAALUDES / ANTEQUERA / 9 Ptas
RHINOCEROS HORNS / MUSCAT DU VENTOUX / Fr 22
SUBMACHINE GUNS / FROMAGE DE HERVE / 5 fr
PITA BREAD, a staple of, among others, Greek cuisine (the only EU country with a protected designation that doesn't appear in the puzzle).